EOS CCA US Asset Management fraudulent information reported to Asperian Norwell, Maine

My sisters delinquent account with ATT was fraudulently placed on my Experian credit report and my credit score was lowered due to this action by EOSCCA. They had her full social security number and a portion of mine. I had never received bills for her at my address in NY where they claimed the bills were going. I had never co-signed for her. I became nervous over the phone and in an attempt to clear up the matter I agreed to allow them to debit my account. After I did this I talked to my sister and she reminded me that I had never co-signed for anything for her and that she was in California living at the time of the billing. I am a senior and I feel as if this is an attempt to fraud. 

I contacted my bank and they are not going to allow the check to be cashed. I contacted Experian and they are going to investigate and will remove the untrue report. (after the investigation is completed). We have to be so cautious now even reports given to the IRS can be flawed.