Vodacom continuing to ***** money from my account

Vodacom is continuing to debit my account after I informed them that I did not open a new contract with them in November 2024. They asked me to send an email to their ***** dept, which I did and yet the thieving hasn't stopped. It also looks like STD bank is also complicit, I stopped this debit order online, they charged me for stopping it and yet Vodacom is continuing to debit my account. How is one supposed to deal with ******* like Vodacom, it looks like my only option now is to cancel my account with standard bank in order to stop Vodacom from *****ulently debiting my account? I spoke with Liam on the 2nd of July 2024 and he promised to call me back, and never did. I then spoke with Olivia on the 4th of July 2024 that also promised to call me back.