Vodacom- unable to process fibre cancellation, still deduction from account 6 months later

Vodacom are able to update additional items to your account immediately But, when you want to cancel, they make it impossible to do online. I cancel my fibre account in Feb 2022 via a call to the call centre and they assured me it was all sorted BUT they are still deducting from my account 6 months later. I am currently out of South Africa and do not have roaming. It is impossible to deal with them online. Online service is shockingly bad, this is not a company that care about correct billing.