ATG Credit Claiming I Owe Them Money Chicago Illinois

ATG Credit,

This company is claiming that i own $1,000 to a school i never attended, ive called to explain that i have never attended said school. I was never enrolled, never attended and report indicates that i was to attend during the sametime i was attending another school. Ive explained to them that this is the 2nd school that has called me implying that i attended them when in fact i did not, ive had to file a police report of ID theft with no resolve by these two schools. This being the latest of a amount coming up, ive asked them to provide proof, they have all my private information but cant send me any proof that i attended or that i owe it how i owe nor will they work with me in resolving the issue that this does not belong to me.