charge for data not used

I am on a STL Smart L package that include 250 call minutes, unlimited sms's and 1GB data. I am on that pagage form March 2015 and it is a amount of R900. I might go over and pay then R1120 on average. I migrated to a 700 minute call, unlimited sms's and 1GB data which in my case are more that sufficient as my utilisation is normally 250 -300mb. <br> Sept I started on the new package called S2X Red Advantage I suddenly get a bill of 4GB to the value of R2258 and in October as well. I do not use that data as my career require my to drive a lot. My data use is for mails and the some google information. <br> I have requested four times for answers as to why and every time I get the idea that the bucket get passed onto another department that are not capable or interested to help me. The fact is that you budget for variable overheads per month and that is the reason for a contract.<br> I still have not received any feed back in a month. Branches can not help you. I was told and have prove that their is ***** in Vodacom with regards to data access on accounts.<br> I also get charged for a handset which I did not require as it is my own handset paid for, iPhone 6. It works out cheaper.