Vodacom *****

I noticed a debit order going through every month on my bank account from vodacom for the last 3 months, went to vodacom 1 month ago with an affidavit stating that I have never opened any contracts with them, my back statements and id. They said it will be sent to their ***** department and that they would stop the contract. The debit order is still going off my account. Ive tried stopping it with Capitec, also didnt work. The amounts are getting bigger aswell. Dont know what to do.