Internet and TV billing

I am writing about the account referenced below and am very upset with the way I was treated after being an AT&T customer for many years.  I contacted AT&T regarding a high increase in my bill and some billing discrepancies that I was having off and on for months and talked to a very nice person who thought that she had corrected everything and had implemented a plan that would be less costly to me.  Then two months later I’ve already received Billings that were once again broken into three separate bills instead of combined, with three different amounts so once again I still I have no idea what my actual bill is supposed to be.  Then in March I got my bill which also reflects another increase because of end of promotion period, which we had just changed in January.  I have been very frustrated with this situation not being corrected, and I am sure it has been noted on my account all the different times we have reviewed this. So I contacted AT&T to cancel my services before the next payment due date and they told me it is all ready in processing so they could not do that and that I would not be refunded for any of the current billing even though it would be for the remainder of March and a portion of April.  My request for cancellation was March 20th.  I do not feel like this is fair billing practices and would appreciate someone looking into this and explaining to me how this is appropriate.  I also asked if they would send me a paper copy of the current bill so that I could review it and he told me that he could not do that without charging me for it.  It doesn’t seem this individual represents your company very well if he would not even send me a copy of my bill.  And if that is your policy and if your policy is also not to refund a customer for a month or even a portion of a months billing they would not even being using, then I am thankful to be discontinuing my services.  Furthermore when I returned my equipment, I was told that I should take pictures of everything I was returning and should retain my proof of return from UPS for a long time because At&T may charge me and say that it has not been returned, that they have had this issue with many of customers who have returned their items through UPS as instructed.  I pray this is not the case as I have documented my returns that were made today.

I would certainly appreciate a response to this letter.

account number [EDITED per Community Guidelines - removed personal information]