After 3 months and hours of telephone calls why can't AT&T get my billing correct?

Established service around the end of September 2016. Purchased bundle for $114.99 per month including home phone, internet & Directv. Was also to receive $200 in prepaid debit gift cards. Service was to include combined billing with auto pay. I was to pay additional fees for a sports package and a higher internet speed. I have dropped the higher internet speed for reasons discussed later in this message and also dropped the sports package so I can compare my billing to the amount I was originally sold. Issues began prior to installation requiring numerous telephone calls including fees which were not to be charged in addition to one that was disclosed at the time of the order. These additional fees were eventually waived although scheduling for installation was delayed due to an AT&T error I will not discuss now. From the beginning we had issues with the combined billing. Although it would show on the online account it was combined it would fall off and the Directv portion was not included. The following month it would not show as combined leading me to make additional calls to restart the process. My bill has never been right and I've been told since bills were not combined the discounts "fell off". I have been assured each month changes are made retro active and all will be made right. The same thing happened this month; after a long discussion with a representative in the Directv customer satisfaction department I was told issue was caused by AT&T not having my middle initial on my bill and Directv having my middle initial. Apparantly when Directv sent the bill is was rejected due to the name on the bill not matching (due to the middle initial). I was assured once again my discounts were applied for Directv and she removed my middle initial to solve the issue. Unfortunately she could do nothing to help me on the AT&T side and had to transfer my call. I explained the situation to the AT&T representative who quoted me a billing amount after changes that is $25 more (combined Directv & AT&T) than the package I originally purchased. I was put on hold several times during the conversation. After a total of about an hour and 15 minutes he informed me he would need to discuss with a supervisior and asked me to hold again. Since I had taken my entire lunch break and was already back at work I informed him I could no longer hold and requested a call back with a resolution. He intitially said he could not call back but later agreed; this was on 1/3 & I have yet to hear back from him. A couple of hours ago I received an order confirmation from AT&T with a total price tag of $140.00 before fees or $25 more than the bundle I purchased. In addition; pro-rated charges of $52.42 are included giving me monthly charges and one time charges plus taxes and fees of $209.53. Since I have (over) paid my bill each month AT&T owes me money rather than me owing prorated charges. And by the way; I learned last month the internet speed I ordered was not given to me due to the proper lines not being installed at installation. I told the customer service representative to cancel since I don't have two hours to spend at home for another installation. I also have only received one $100 gift card. I inquired last month and again this month and have not received an answer. I have spent in excess of an hour on the telephone every month since I ordered the service just trying to get what I ordered. I have been patient but am no longer willing to spend hours on end discussing this each month only to repeat the cycle the next month. If you cannot get this issue corrected I will contact relevant agencies of the Federal & Alabama State Governments to file complaints. Mistakes are understandable if corrected but there is no excuse for this issue continuining for over three months.