Citibank Debt Collection Complaint

Citibank Debt collection department,

Credit card False statements or representation Attempted to collect wrong amount Pennsylvania

In 2014, we fell behind on making a credit card payment. We were contacted by -. The original creditor is Citi ATT & T Universal -. At this time, I calculate that we have paid them over $11000.00. However, on my credit report it shows that I only make a monthly payment of $460.00 per month and the account has also been marked as closed. However, I receive a statement from Citi - - - monthly, and it shows they are still charging me interest. How can this be when the account has been closed and charged off? I feel that they are not applying my money in an appropriate manner so that this may be paid off quicker. While I do agree that we were behind and we owe this debt, I feel they are being unfair in the collection process. Thank You.