MTN Overcharging and not sending itemised billing

In the last 4 months my bill has suddenly shot up and I have been debited the following:<br> 30 Sep 2015 R4,061.70, 31 Aug R4,264.80, 31 Jul R1,875.11 and 30 Jun R1,802.46. Iv'e been trying to get an itemised bill for each month, and still haven't received a thing. These were for \package switched data calls "Firstly I did not request for my line to be open and I have requested for a limit of \""0\"" and no credit. But yet I am still billed these insanely high amounts. I use the wifi at work and at home and have limited my data usage so therefore this makes no sense to me. Please can someone escalate this and correct this mistake. """