Data Usage and Billing Query

My bill for the month of January 2015 escalated from the previous bills and normal usage 6 fold. Realising that this was way above my normal usage, I approached an MTN shop at the Menlyn Shopping centre. A the shop I was advised to request the itemised bill as well as my original contract from MTN service provider. I have since recieved the bill, however I have not yet been given a copy of my contract despite numerous calls I have made during the last 4 and half weeks. My itemised bill reveals the following:<br> <br> 1) The lagest portion of the bill (which is 5 times my normal monthly bill) was incured in one day. The bill shows that this usage comes from data usage that I know I didn't use.<br> <br> 2) The data usage items in the bill do not however specify what data was downloaded by my device.<br> <br> Let me also state that I had selected a curbed airtime option in my contract. It was therefore astounding for me to recieve such an astronomically high bill. It is for this reason that I requested MTN to provide me with my contract.<br> <br> I feel that the service I have recieved up to now in dealing with this matter leaves much to be desired from both the MTN franchise shops and MTN SP