Wont honor credit promises wont activate warranty phone

I have called XFinity over a dozen times and my issue has not been resolved. I have been promised call backs which I havent recieved, credits which I havent recieved, and, after a dozen calls, YOU STILL HAVE THE WRONG ADDRESS FOR ME. When I call in from my XFinity phone, the computer tells me I dont have a phone account with you. It takes me 20 minutes every time I call to finally get to a human, and I have been unsuccessful at getting to one that has actually been somewhat competent at their job. Saying your customer service is terrible would be implying that there was actually any service to critique.