Billing

I have tried to get a detailed breakdown of a bill but there was no response for the last 6 months. we were requested to pay R673.00 on the 06/02/2015 which we did. the account balance was then 2522.27. we have now received a bill for over R4200.We have not used data on this account for the last six months or more and have paid for the handset for well over 12 months. why are we being charged data costs . <br> <br> can someone please call me to discuss this bill and preferably someone component tel ***/***. <br> <br> DO NOT CALL THE CELL PHONE NUMBER AS IT A SIMCARD FOR THE IPAD ANDF NOT A CELL PHONE NUMBER