Vodacom *****ing money

I am now living in the UK, since 4 August 19. I terminated my Vodacom contract at the end of July for my cell phone in South Africa. I have however continuously had them take unauthorized deductions via debit order off my account in September, October, November and now again December. This is after at least 10 calls and numerous emails trying to resolve the matter. I’ve now contacted my bank to help, but it is TOTALLY unacceptable and I would like them to refund me.(no below is my SA number that should be cancelled, they can contact me on my email which they have)