EOSCCA AT&T uses bogus company for collections; victim of identity theft and another company filed with credit bureaus. Boston Massachusetts

After being notified by AT&T via customer service rep. at the store, that I owed them $1295.90 for a U-Verse account set-up 30+ miles from where I live, I contacted AT&T and a rep. refused to give me any information.  Said I had to talk to the collection agency. Called EOSCCA at above number and said I wanted to file a fraud claim.  They mailed it to me and I filed a police report, filled-out documents and returned to EOSCCA.  I never received a letter from them.  I have heard nothing further until yesterday, I pulled my credit reports and a collection for $1295 is on all three reports.  I got the name of the collection agency (Franklin Collections in Tupelo, MS) off my report and called them.  They said I had never contacted them nor had they received any fraud claim paperwork.  I tried to explain the situation and the woman was EXCEPTIONALLY rude.  She stated they sent me a letter to the address where the U-Verse was installed.  *NOTE: if I am the guarantor and I live in another city, why would you send a letter to the person who did not pay it in the first place???  I requested a supervisor.  A man came on the phone, I explained to him what I had previously said and he asked if the identity thief had been caught! I responded "I don't know", he told me someone had to pay this bill!  I requested another fraud claim package be sent to me for processing.  I immediately called back to request a copy of the paperwork installing the U-Verse to the fraudulent address, and they would not answer the phone.  I called back four times.  What I want to know, is how did AT&T install cable and internet in a town 30 miles away, allow someone else to set up an account and then allow them to run-up a $1295.90 cable bill without ever seeing my driver's license???  I have had an AT&T cell phone for 19 years and a complete stranger can get free cable and I can't get any information about my own account.  I will be talking to AT&T until this is resolved or park on their doorstep till dealt with.