Wesbank took my money and is not refunding me.

Wesbank has been unfairly debiting my account (March;April & May) even after my account has been settled in full with them. Call made reference *** 2020-05-12 12:19 to which I was told by the consultant account was not settled, this was incorrect information Email sent 2020-05-18 09:21 with proof of payment - no response. Follow up call made reference *** 2020-05-21 15:06-consultant assured me account has been settled and closed no further debits will be made, again untrue. The consultants really have no clue as to how to resolve these enquiries, the complaints portal does not, only errors each time one tries to report the issues. They owe me 3 months worth of money which they took from my account with no reason to do so.