Synchrony Bank Debt Collection Complaint

Synchrony Bank Debt collection department,

Credit card Cont'd attempts collect debt not owed Debt is not mine California

I did have a Mervyn 's account ( -? ) but when the store closed in our area in -, I paid off my account and closed it. I JUST got a letter from - - - ( - - ) saying that this account was " charged off as an unpaid delinquent debt on - '' but - wants me to pay them $370.00! I do not owe this money and asked the credit agencies ( - etc ) to remove this from my credit reports.