Intermittent Uverse Service

I have had intermittent slow uverse service for the past month. When I run a speed test, it either doesn't work because the service is so slow or it constantly goes up and down (mostly down). The slow connection started on November 23rd. I called a few days later and the rep sent me a new modem. By the way, when they send you a "new" modem, it's usually a refurbished older model that may or may not work. I have a friend who works for AT&T who escalated my trouble ticket, so someone from the "President's Office" called me to try to help. By help, I mean simply having someone schedule inside or outside techs to come to my house. So far, I have had 7 techs (4 inside and 3 outside) to my house with zero resolution. The last inside tech tried everything - replaced the modem with the newest version, replaced our dsl wiring from the jack into the modem, tested the outside box and wiring several times, then called the "central office" which is 4 blocks away and had them change our port. I have been told 3 outside techs have been here and gone up on the pole and everything tested fine. I honestly don't think any of them actually came. I was home each time and never saw anyone. An outside tech supposedly came yesterday and wrote in his notes that he spoke with me directly (what?!?). This service is horrendous. I have wasted so much time on the phone and in person the week before Christmas with all these AT&T service reps and techs, just to have my internet running slow with no explanation or resolution. I am beyond horrified that AT&T runs their business this way. How do I get my slow internet connection fixed? I am dumbfounded.