Incompetency of MTN staff costing me money

I upgraded my phone Middle march 2015. About an hour after doing this the minutes and SMS's that was supposed to be loaded to my phone appeared on my wife's phone (same account , different number) instead. <br> We immediately called the MTN call centre and was insured that the mistake would be rectified. Shortly after this the Minutes and SMS\ where loaded onto my phone and I assumed the matter was resolved. To my surprise an amount far exceeding the amount stated on my statement was debited from my bank account at the end of March. I immediately queried this with the call centre and was informed that both the numbers have been upgraded! I requested that this be rectified and the costs reversed and was once again assured it would be resolved within 5 to 7 working days. By the 15th of April I have not received any feedback nor the new statement so I called again. I was told the matter has been resolved but when I asked about the credit that should be passed the consultant sounded very confused and asked me what credit i was referring to. I asked for a statement which was not received yet. Later that day the same minutes and SMS"s was once again loaded onto both phones!"""