BAD SERVICE from MTN

I have never been so frustrated!! I have been trying to change my debit order with MTN for must be at least a year, to no avail. I am told I need to go INTO a store to do so, but on the occasions that I have been in store they tell me they CAN'T help me because their system is down. Nice. Then I try and phone the help line to help me and they tell me they can't do anything. In the interim they insist on putting the debit order through (which is now against an account that is CLOSED) which they have been informed about but NOONE at MTN has done anything about it. Everyone I have spoken to tells me they will call me back to help, but they NEVER DO. They continue to submit the debit order which doesn't work. I have now been paying CASH for the past 6 months because I can't get it right for anybody to change my account, and then I pay again at the end of May and today I have my service suspended because I owe R67 on the system. But not once has anyone communicated with me to tell me this is the case, they just suspend my service. Then on the line I find out that the primary number on my account has now also been CHANGED, not from my request, so I no longer receive any communication from MTN, but they cannot change this now because I owe R67!! Oh my goodness, is there anyone at MTN that has an ounce of customer service knowledge? I doubt it, you have no idea how to look after your customers, you make our lives extremely difficult. I am seriously considering moving my account at the earliest convenience, I have had enough of MTN and their bad/nonchalant service. Period.