MTN has been overcharging since April and refuses

Since April of this year MTN has been charging absurd amounts of money and i have been asking for itemised billing to see where exactly these charges are coming from. since May i have been give the run around and still nothing. In april of this year my phone bill was about four times my usual amount. I called and requested the itemised billing report. I have done this before when my bill didn't make sense and i would get the bill within 24 hours. After struggling to get through for many minutes i eventually spoke to someone. Two weeks after that the report never came. Since April MTN has been charging me unexplainable amounts of money and i have asked for an investigation to be done but till today no one has gotten back to me. I have requested for my itemised billing every time i called, still nothing! This is wrong!!! I am suffering every month because MTN is taking money out of my account that they are not explaining how i could've used up that amount!<br> <br> I have Wifi at home since May, I do not use my phone during working hours because at work we do not bring in Cell phones. How is it that my bill is R6000 or R4000 MTN????<br> <br> I want my money back and all the calls i have made no one