Closing account no A*** seemingly impossible

Ever tried to cancel an MTN account? It would most likely be faster to do it by carrier ***eon, ironically. Calling the retensions department is impossible since no one ever answers the phone. Emails are responded with a request for my SIM password; I have not used the account for more than two years so do not have it. My ID number should frankly suffice. No response upon email request either. Go to Cape Town Waterfront MTN store and the rather unfriendly response is - do it by phone. At this point I am considering moving my bank account so that I no longer have to pay the debit order!