Irregular Billing

I have taken a 3g data contract which was for R300 per month. I have received a bill for my 3g data in January 2016 for an amount of RR2497.23 which i do not agree with.I have contacted to the call centre on since 24 Jan on 808 to query.I was told by the consultant that a url report will be orderd which will prove the usage of the service.After a week of waiting i did not recive any feedback.I called the call centre again and the consultant confirmed that the first request had been made however there was some error with with the request the consultant advised that she will need to log a new request and that it will take about 3 days for the information to be sent to me.I have waited for the tired day on which i called the call centre again.The reference number for the third call is *** I spoke to another consultant who advised that he can view the previous query but again no url report has been attached.In the time taking to get the first query resolved i received another debit through my account for an amount of R6185.39 which was odd as after the first bill i had switched of the device and had not been using it. MTN is ripping clients off !!!!! i want FEEDBACK