MTN - worst company ever - terrible customer service

I am so angry , MTN opened a cellular contract for someone on my name , my bank Acc details without FICA or RICA. Now they won’t stop the debit order because I have to call their ***** line to stop it. I’ve proved to them that it’s not my email address on the form , it’s a male’s name. This is probably an inside job because they did not ask for the appropriate documentation which is the following which is taken from their website:

MTN basics ID. Proof of residence (e.g., levy statement or electricity bill) Proof of income. Three months' bank statements.

If they had this disgusting individual would not have been able to take out this contract.

They didn’t do their job but I have to sit with the problem of stopping the debit order. How is this fair? I don’t know whether the SAPS will help me , I have the persons cell number ( on my name) home address and email address.