Overcharging on data, with no assistance or explanation!

<p>After having a contract for 4 years and never having to pay extra for data, I received 2 huge bills over the last two months. </p> <p>I have a plug in device with 2 gigs data per month. I only use it for checking email and a few searches a month.</p> <p>I have requested for itemised billing multiple times. Nothing yet. The consultants I see at Stores just tell me that I must have used that much data but it is impossible. </p> <p>I want an explanation on how on earth I could have used more than R1,000 worth of data if I only plugged the device in twice this last month?!? </p> <p>And the terrible service and disinterest of the staff at MTN stores. </p> <p>Shocking!!! </p>