I am having multiple issues with Uverse and billing and customer service

I hate ATT.  I signed up for Direct TV, internet and internet phone in May because I was attracted to the $89 per month promotion and Comcast was getting much too expensive.  I already used ATT for wireless and my land line.  During the signup process, I also cancelled my landline since I really don't use it anymore and the only calls I received were sales calls (yes, I am on the "do not call" register).  So, I started to get random bills.  I called and told ATT that I had expected everything to be bundled.  A couple of bill cycles later, they managed to do that, but only after talking to several people.  I was also advised to call PACBELL to make sure that my land line was truly cancelled.  I did, and it was.  So, I keep getting bills on the old account, and bills on the new account.  In reviewing the bills, I can see that I am being charged for the same billing time frame on each account.  I also found out that I had been continually billed on the dead phone line.  After spending over an hour and 15 minutes on the phone with 4 different people, the call was dropped (of course, I use ATT) and even though they took my phone number, no one called me back.  The last idiocy I heard was an explanation that when I bundled my bill (it had already been bundled with land line and wireless) that it would be charge a month in advance.  This seemed utterly stupid to me.  So, I just received yet another $300+ bill (so I guess i didn't pay for a month in advance) which, they say, contained "a prorated period."  Since I already paid a full billing cycle under the new account, what could be prorated?????  I am fit to be tied and the people there are all total mor*ns.  My closing bill and my new account bill are charging me for the same services in the same time frame.  What is so hard about understanding that I am being double billed!!!!  Do they just expect people to give up in total frustration and pay the bloody thing?  I hate ATT.