No answer

I have 2 cell contracts. Both are on TOP UP The one is for my mom and the other for me. In Jan I also took a contract out for a laptop, R299/month with 500MB. I asked several times that it must be added on MY cell phone contract. I also request that they must make sure that the laptop is also on a TOP UP. I do NOT want any high bills at the end of the month. In spite of that, my mom received an sms saying that her services has been suspended because she reached R1000??? I took the sms to the shop in Modimolle and they told me that is a mistake from MTN. I again asked them to make sure that it can't go over the limit. Today R1433.65 was deducted from my bank account instead of R788!!!! Went to Brooklyn and all the lady can tell me is that she will log a call to find out what is wrong. What is the use of a shop if they can not help you? Why is the amount so high if I repeatedly asked that there must be a limit set. After this contract period I am done with MTN. There is NO customer service at all. At least the sales lady gave me a reference number *** for what is that worth?? I can understand that people just get so frustrated with MTN's service.