Trying to close an account

More than 4 years ago I accompanied my father to Std. Bank branch Kuruman to close he's Gold card. We sat with consultant who phoned and cancelled the account - or so we thought. This year my father received a statement saying that he has a credit on the account - you would think that is good news. AGAIN!!!!! We went to the Std. Bank branch Kimberley to the BRANCH MANAGER and explained to her that we closed this account but he received a statement. She AGAIN helped us to close the account and arranged for the credit amount to be transferred to he's consolidator account - PS : If you ask for a reference no from the call center they say : Oh, just write my name down?? So, a month later we AGAIN receive a statement and AGAIN went to the BRANCH MANAGER in Kimberley and AGAIN she tried to close the account. The money was transferred, thank you, but this morning I sit with ANOTHER STATEMENT FROM THIS ACCOUNT!!!! NOW WE OWE STANDARD BANK R45-12?? WHAT MUST WE DO TO STOP THIS F ACCOUNT!!!!!! My father is a pensioner with Alzheimer's, I try my best Helping him to live a stress free life and then he KEEPS ON GETTING THIS INCOMPETENCE PROVEN LETTERS FROM THE Standard Bank!! CLOSE THE ACCOUNT