Synchrony Financial Credit Card Complaint

Synchrony Financial Credit card department,

Payoff process Maryland

Sent - bank drafts to Synchrony Bank for payoff of - separate accounts. Each check clearly indicated the last - digits of the account they were to payoff. - checks were properly credited, the third was not. Have made numerous phone calls and faxed copies of the cancelled check to the bank. The cancelled check clearly indicates the check was received and cashed on -/-/2016, well within the payment due date of -/-/2016. However, it was not credited to my account. In fact, they have added interest and late fees to the account and refuse, despite receiving proof that they cashed the check, to credit my account. Any help you could provide would be appreciated.