Unauthorised debits by Vodacom after contract cancelled

I have been with vodacom for years and I am absolutely disgusted with the service. My contract has come to end last year and wanted the contract to be canceled. I have went into the store at woodlands mall and requested my contract to be canceled only to be told to do the cancellation through customer care. I called customer care to cancel and was told it was done only to find out later it was not done . I went back to woodlands vodacom where an agent called the call centre to cancel and was assured again it was done. Months later I saw that I was still being debited and again called the call centre and again was told my request for cancellation has be done. I put a stop order my bank account only to find out the account is still active and now vodacom has handed me over. This is really sad how vodacom treats their customers and debiting accounts without authorisation.I am now told I need to go to the police station in COVID to get an affidavit all because vodacom did not do their job and refuse to pull out phone records .Why does vodacom inconvenience their customers for mistakes that was made by them .Till today this has not been resolved and no feedback from vodacom and wrongfully handed over for a mistake by vodacom