over charged for charges on my bill

I have called up countless times about this contract and previously I was apart of the nashua mobile group, At the time I took out this contract i requested for a call bar to be placed on the account for the amount of R10, although when i quered this it was either removed or made to be a R1000 call bar where i was then charged for R1200.00 each month for data and calls which I could not understand why as i would normally be barred at R10 over my limit ! I requested the Call Cntre to check the notes and they say they can find nothing as I was with the nashua mobile group.<br> <br> I was disgusted that they had no records and found this to be alarming tn not being to help me after finding out i have been paying over a thousand rand each month for my bill.<br> <br> I requested feedback none was given, i dispute these charges as i was never aware and also the notes that was stated in the contract from the start is now gone and has no ref! i refuse to pay as i have not been assisted and i wish for this to be escalated to the highest level of complaint! due to the strike i have been awaiting a manager to call me for the last 5 months !!! ALl i want is for my bills to be fixed !!! asap !!!