Cancel contract

My contract ended March 2020. I advised them since December that I will cancell my contract as Im currently in New Zealand. I have sent 10 emails to get my contract cancelled, which they are still deducting from my account. I only get emails saying sorry for the delay....not one of them attending to my query. I went as far as transferring all money so MTN can't deduct the money again. I need my debit order to be cancelled and all my money refunded to me. I also logged a query at the Telecomminication Ombudsman. That is how fedup I am with MTN. They are comitting ***** for taking money for no service. Hopefully this will wake them up