Cancelation after not receiving device and sim

Took out a new contract with vodacom on the 4th of August and after not receiving my sim and the device decided to cancel the new line. I have called them repeatedly to cancel as I have not received my order, was told that they will contact me 48hr to proceed with cancelation. Now it's 3 months later and the contract is still not canceled but my bank account is still being debited after I have called them repeatedly and the only reply I get is that it has been escalated to higher management. I would not recommend people to take out a contract with Vodacom.