How can I contact billing services via email!

Hello, AT&T. I would like to start out by saying that up until this past December I loved AT&T services, I been using your services for years but today I can't say that anymore and it all stems from a AT&T Rep on the U Verse side that gave me the wrong price to have Internet and phone combined for $152 a month to have it end up being $238 a month. My wife and I sat here on that day back in December and had the lady Rep repeat what the price would be and she again said $152 a month with the exception of a $33 dollar charge added for the first three months to cover the one time hook up internet fee and we agreed to the deal. When the first bill arrived we first thought it was the instillation fee so we paid it and later found out it was for internet fee of $40 and the $33 instillation fee and we called and to our surprise the U verse side and the cell phone side were not together like we thought and that it would take some time for both the internet and phones to come on one bill so we said that was okay with us but what we seen until that happen is that our bill for both was at $238, way above what we agreed on so I called up and asked the rep to as why our bill was so high and we were told it was due to the fact that they were charging us like there was never a deal made and I told them what the price we got and that what they were billing us was wrong, so they said they look into it and not long after that we called again and told a rep that our bill isn't right and that they would put a case in for us as to see what happened and was assured that we will be contacted but weeks went by without a single call or email and so we called again and again explained our issue and that they didn't know why their was a hold up on the case but assured us that someone from that department would get in touch with us but nothing ever came of it and again I called and again I asked for a reason for the hold up on the case and the rep said she didn't know but that she would put another case in for us and again we waited as another almost month went by without a single call or email as to why we are getting charged $238 a month on a bill that should have been $152 a month. On June 1st our service was turned off and I called again to see what happened and I again explained our issue dating all the way back to last December and we got the same answer and I asked about the 2 cases that was put in regarding our issue and to our surprise we were told that they don't see any cases turned in regards to my account and by that time I started to get angry but I held it together and ended the call and called again because I couldn't believe this could be happening to me and my wife. A rep came on the line and asked me what can we do for you Mr. ***** I again explained my issue with my bill and that we had 2 cases in on it and that rep said she would get a supervisor on the phone to get this matter cleared up and that they are so sorry for what I have been dealing with for close to 6 months I let the supervisor know what was going on and he said that the cases been closed for close to 2 months and they didn't find anything wrong with my bill and I asked him why I wasn't notified of this and he said that "maybe I had a block on my phone and missed the calls. I was not to happy with that remark but I still held it together and I asked for a reason why the cases were closed and he replied that AT&T doesn't believe I ever got that price and that I never had a conversation with the rep who took our order and that I was a liar. I could have told him off and many people i know would have after all I been through ever since this all happened. I think what really got me is after all that I got from that Supervisor he asked me "Is their anything else I can do for you? "and a response of I'm sorry but there is nothing I can do for you and I also want to say he said, What do you want me to do for you and I told him in a pleasant voice. I have no service, a bill over $400 and no means to pay that amount. I need what I was promised and he said he couldn't do anything and AT&T stands behind their decision. I ended the call and went onto the chat session on the AT&T website and explained what happened to me and I have a copy of that session that I will be sending you after I send you this email. I call it a lot of promises and lies and when you read it you will see what I mean about saying one thing and doing another and that all happened over a 3 hour time span. All I ever wanted was to get the price I was given. I did talk to one rep who I felt that took the time to look into what really happened in regards to what the rep that gave me the price and that is the rep might have used my old plan price and added everything onto that deal and that would be closer to the truth than to be calling a long time loyal customer a liar, but if even that did happen? I should not be the one who pays for that mistake. I should be wanting to get as far away from AT&T but I am willing to give you one last time to make this right and that is because I don't believe the company treats their loyal customers in this manner and that a few bad reps don't tell the story if a company is good or bad. I'm hoping that you can see through all that I been through that maybe the customer is in the right on this one. My contact number to reach me is at *****. Thank you for taking the time out to help a loyal long time customer out... David [edited for privacy-please do not post personal or unique information such as but not limited to full names, employee ID numbers, email addresses, phone numbers, account numbers, etc.]