Crazy data bill and no itemised bill

I have a data contract with MTN. I have tried to request a detail itemised bill for this account to be e-mailed to me, over the phone and on MTN active, but I have not yet received them. I am looking to inspect my itemised invoices for May 2015, June 2015 and July 2015. I received massive data bills for each of these amounts, but I am not able to understand what happened during these months for me to be billed for those amounts.<br> <br> I opened my contract in May 2015 and looked at my contract agreement and cannot see any mention made that this is an open contract, I was under the impression that I had a cap at the allowed 10gb, but received massive charges for exceeding this cap. I have subsequently placed a cap on my device and have not been able to even max it. Which makes me wonder how I exceeded them so much in the mentioned months.<br> <br> Please help me to get an itemised bill and show me on my contract agreement where it was mentioned to be an uncapped data contract.<br>