AT&T Uverse Their Lies Hurting My Credit Score

Back in April I moved to a new house, AT&T was scheduled to install internet into my new home on my only day off, but they changed the date without informing me. When I called to complain I got hung up on multiple times, once by a supervisor. Eventually I spoke to a manager that appologized and promised to "take care of" my last bill. Instead I have been handed over to a collection agency.

Today I called to complain about the bill not being forgiven as I was told and was hung up on again. On the second call I spoke to a very rude woman claiming to be a supervisor who informed me that I had been offered a free month to stay on, and nothing else. This is a lie. I may have been offered a free month to stay on at some point, though I don't recall. What I know for sure is being told that I would be comped my previous bill because of their failure to contact me prior to changing the scheduled day, and for the day off of work I was forced to take to have the instalation done.

Either they failed to note that I was offered my last month being comped, or they deliberatly lied to me. Either way I now have a mark on my credit score and am being forced to pay for something that I'm not supposed to.