VODACOM CANCELLATION DEPARTMENT SHOCKING

I cancelled my Vodacom data contract in January 2021, 3months down the line they are still debiting my account :( Every month I call them and they say it's been cancelled but I never receive emails or Sms's to confirm this!!! when I email customer service they cannot help??? I have had to go into my bank and put a stop to the debit order, but was told by my bank that this doesn't guarantee that they will stop debiting my account!! it is so easy to sign a contract but when it comes to cancelling nothing is done!!! Vodacom I will never recommend anybody get a contract with them!!!