extra charge for data

I received a bill of over R500 to be paid at the end of this month being charged extra for data that I didn't ask for or need. I lodged a complaint and got a case number ***6 to reverse the charges. Called few days ago as got an sms saying could not reach me and was told that case was successful and the amount of R349 will be reversed. Got another sms yesterday stating again that the total R550 something will be deducted! <br> Called customer service again and told this time there is nothing on the system? The lady lodged another querie after i questioned why. I also asked her to check recorded call records as it should be on my profile but there was nothing just the case number. The system did not even show that I upgraded my contract on the 08/12 which was before I was first told that the R349 would be reversed and my bill would just be R199.<br> Tried thereafter via inbox via your Facebook page and got sent the original invoice for over R500 and not one mention of the case number and it being sorted. <br> Im being sent from pillar to post and this reverse of the R349 has somehow been removed from the system? ?<br> I didn't need data as i already had over 10gigs? Correct ASAP PLS!!!!