Question-problem with first bill

I recently returned to DirecTV after several years and signed up for the Entertainment package with a few premium channels that are free for the first 2 or 3 months (depending on the channel). Entertainment package is currently offered for $30 off for the first 3 months, bringing the total to $59.99 plus tax. However, my Visa was just billed for $83.09. The Customer Service Agent I called today maintains that the amount is correct and the $30 promo begins the 2nd month of service. However, I just checked the screenshot I took when I signed up, and it clearly says $30 off for the first 3 months. (I did not get the Gemini device. I stream with a Roku and the DirecTV app). My Account's Payment History shows a charge of $63.01 that never made it to my credit card but seems to be the actual correct amount. What gives, and what can I do? After this Bad Beginning, I'm skeptical that I'll get the deal I signed up for.