MTN poor service

I just received a Bill from MTN for the month of August 2015 on my iPad, the Bill is R3812.38. I don't have a problem with paying the bill and that was my mistake, but when I called the call centre to ask how much excess data I used they were unable to give me an answer and said they can only give me the Value I went over which to me sounds like ****. In addition to that I asked them to set my account to the maximum usage of what the contract is (1 gig) but I have to dail a code but the iPad doesn't have that option so the next best thing was to put my iPad sim in my phone but that woun't work because my phone and iPad Sim's are two different sizes. Next best thing is to go to an MTN shop so they can do it, unacceptable...they can order you a new phone over the phone so \conveniently"but not set a limit what an Inconvenience"