Synchrony Bank Debt Collection Complaint

Synchrony Bank Debt collection department,

Credit card Cont'd attempts collect debt not owed Debt was paid District of Columbia

My account with Banana republic is paid completely and closed -/-/-. As a matter of fact, they sent me a check back for overpaid owed money $600.00. Yet some how the account was reported as charged off -/-/-, despite that it is been paid and closed -/-/- The account has been sold to - different collection agencies ever since. As of now the account sits on the credit report as in collection and a separate collection agency for the account is there too which is ruining my credit and score. I disputed the item with all all the collection agencies and Banana Republic but got no where. I am attaching all document for your information.