Unauthorised debit order by vodacom

I had a month to month fire account with Vodacom, it served it’s purpose. I voluntarily suspended the account because I had to move in April 2021. However, vodacom is still debiting my account to date. I have made endless calls and send emails but I am not getting anywhere with it. Clearly they are refusing to cancel the arrangement.

Apparently they do not see any cancellation on their side which one of their consultants confirmed in April. I then asked them to send me the recording of my call in April, they never responded. They instead gave me different methods of cancellation which I tried with no joy.