Credit card or prepaid card — Unknown

Card was charged for something you did not purchase with the card. On XX/XX/XXXX I was called by a creditor Nelson Cruz and Associate they claimed I owed XXXX XXXX XXXX XXXX {$12000.00} from XXXX thru XXXX ... I never had a credit card with XXXX or applied for credit with them ... On XX/XX/XXXX I called XXXX XXXX XXXX XXXX and spoke in someone in customer service along Security and Fraud Dept. I gave them my personal info SS #, DOB, address and they did not have me in there records..