Incorrectly billed - Call Centre not answering

I recharged my account yesterday after being told I had run out of airtime, whilst I was using the internet. I found this very strange as my account balance said I still had more that 900MB of data and R6 airtime!! My account (Topup200) had also recently been credited with the new months airtime but clearly my airtime had been used instead of data. I do not call from my phone often and there is no way R200 would have been used in such a short space of time. I recharged the account nonetheless yesterday with R180! Today it is finished!!!! I refuse to believe that the internet bundle (I purchase in excess of 4GB per month) is being used. <br> <br> I was on the line holding for your call, but there is no answer! I need someone to contact me urgently and explain to me exactly what is going on and supply me the necessary evidence to back up whatever is claimed to be the problem. <br> <br> I look forward to a response within a reasonable time frame.