Why doesn’t ATT have continuity in repair service, 6 months, 4 techs, no repairs made?

I have U-verse 450, pay 291.00 monthly for bundled services and have had 4 of 6 TVs non functioning since Oct 1.  In Sept. An ATT tech installed a 6th TV in our home, made the connection in our attic and after that 4 TV’s began freezing, re-setting automatically appx. every 5 minutes.  A new Tech Enrique came out Oct. 1, attempted a repair, he made 3 attempts.  He texted and talked to his supervisor Nathan, I was given both Enrique’s and Nathan’s cell numbers to contact “if”I had problems.  After numerous texts and requests for help, Enrique told me that his supervisor Nathan said I needed to call ATT and get back in regular rotation for repair with a different tech.  Enrique did request that Nathan come to my home but Nathan declined.  Next Tech out was Kyle, 3 visits, again no supervisor to help., he told me to call ATT 800 number and get in rotation again.    I called ATT and was told that my Acct. was escalated and someone would be out to repair my TV’s, Victor came, no supervisor, 2 visits and he went on vacation. He said his supervisor would call me and continue to monitor the Acct for repairs.  No one ever called or responded to my texts.  Again I called ATT, after an hour I finally spoke to Supervisor Martine (1/14/19).  She also told me that my Acct had been “escalated”, and that her supervisor would call the local supervisor to be sure that he came on on the repair scheduled for 1/15/19 with a senior tech. She PROMISED that she would absolutely follow up and call me on 1/16 to be sure the appt. went as she scheduled.  Surprise, she never called, and the appt. failed. On 1/16/19 ATT tech Dustin called and said he was coming out, I asked if his manager/supervisor was also coming and if he was a senior tech. He answered no to both questions, and had no idea of the history of the Acct.  I declined repair service unless a manager could come also, he said he spoke with his manager and that the manager could come 3 days later, I agreed and asked for the manager’s name.  Well of course the manager is “Nathan”, the same manager who 3.5 MONTHS earlier declined to assist his tech Enrique on my account.  So now I’m waiting for Nathan to come out on 1/18/19, what are the chances that A) ATT will make the repair, B)ATT will act in a professional matter and accept responsibility for the complete lack of continuity in service which has lead to me paying over 1200.00 for U-verse bundled service which are documented to have not worked in almost 4 months?  As ATT doesn’t provide any means for customers to have continuity in repair service,  no one accepts responsibility and no one is help to accountability.  It’s a joke, I have no less than 5 different phone numbers for techs and supervisors who instructed me to call or text with problems, apparently ATT thinks this makes them look accountable and caring, but as no one will respond to these texts it’s really just a facade, there is no true respect for the customer on ATT’s part. I’ll be glad to provide the numbers and screenshots of texts to an ATT rep. IF anyone asks.  BTW, I have used ATT cell service for over 20 years, and I have 2 residence account with ATT U-verse and bundle service.