Standard bank bad service

Hi I'm Gloria five years ago standard bank informed me that I have an outstanding balance on my current as I left the account open. I didn't understand as I knew I closed the account. It reflected badly on my name so I decided to settle the account last month now I need the paid up letter from them so I can clear my name and I'm being send from pillar to post. I have been transferred from debtreview, recovery, collection and the bank it's self now I'm told the account it's with MBD lawyers and there not even helpful in the matter. I paid the money into standard bank as I was instructed by the standard bank now the say they can't trace the money. I'm very frustrated help me.