Debt collection — Medical Data Systems, Inc. (AL)

Debt was paid. This Debt was is not owed and listed under XXXX of XXXX and I am on XXXX and all labs are paid for each visit and I talk to lab first and they said all my debt was paid in full, but the collection company Medical Data Systems Inc wo n't take this off my credit report and I have called them to get them to call the creditor and they want do it and I ca n't get them to do their job by checking information correctly because it appears on my credit report.