Extreme Data Usage

Hi, do you guys have an operational call centre? i have sat for an hour at time on most days and the call is never answered or worse gets picked up and immediately dropped again. I am struggling with this issue since December and have actually stopped using the sim and or number till this issue is resolved. In December i get an account for 25k for data. I lodged a dispute and was told the billing is correct but never in all my years at Nashua was the bill over R1500 EVER. Get ported over to MTN and the costs just seem to roll out on their own. I have asked for explanations sent emails etc but there doesnt seem to be anyone behind the computers receiving these emails either. Needless to say all i get is the bill is correct with no explanation how a bill can jump 20 times its normal average.<br> <br> But it gets better the very next month on my other MTN number i get a bill of 10k again i query and refuse to pay this bill either as something is clearly not right. To my amazement you credit that account with the reason that there was a billing error from your side? How is it that only one bill is affected and not another? I basically need to know will MTN come to the table to resolve???