HIGH Data Charges and No feedback

At the end of August, when going into MTN Parow Center. I was informed of data charges I incurred on my laptop ****le. 2749.04MB. I could not believe what I was told and what I needed to pay. MTN told me an investigation can be done, I would need to call 808. The investigation was done and on the 5th September MTN told me the charges were correct and that they also had an increase in data costs. This didn't make sense to me. How could I incur more data charges now and two months before my contract was to come to an end. Never did I incur so much charges while I was studying and I used the ****le more then. These last few months the ****le was only used for quick searches and sending quotes. I then rep**** to the email of the investigation as guided by an MTN consultant who said if I want to query this again I can do so. I have not received any response thereafter. My cellphone line was suspended and every time I call in I am told there is no note of the investigation. I called in again today and again was told there is not even a reference number of my investigation. How pathetic. What have you been doing. Charging me now that my contact is done. I want an immediate response. ANGRY