Failure to close account

To whom it may concern,

Melandi van Jaarsveld ID: ********** 005083

My wife had a account with FNB. She closed it years back. now when we wanted to get a home loan we were told that there is a outstanding amount of 1000 and we have to d=pay it before they will assist us. I do not think it is fair as the charges are bank fees and bounced debit orders. Please can we get assistance as soon as possible as this is delaying the purchase process or we will be forced to change banks. thanks in advance.