Synchrony Financial Credit Card Complaint

Synchrony Financial Credit card department,

Identity theft / Fraud / Embezzlement Texas

I was a victim of identity theft and noticed a collection from SYNCB/WALMART I 've attempted to dispute multiple times however no response on their end. Not sure what else to do. Police department told me to contact the federal trade commission which I wrote a formal complaint against SYNCB/WALMART in regards to this matter. The FTC also instructed me to complete a id theft affidavit through identity theft.gov. Attached is my document. Thank you