RCS (Pick n Pay) staff failing to do their job and refusing to take responsibility.

RCS (Pick n Pay) staff failing to do their job and refusing to take responsibility. I phoned and requested for settlement balance on my account in order to close the account. The sent me the amount which I paid and called to ensure that the account will be closed and was promised that the account will be closed within 5 working days. A month later I receive a statement with a balance of admin fees because they failed to close the account. They now say I have to pay that amount in order to close the account. I want that account closed and I want nothing to do with RCS or Pick n Pay.