Data Report

I bought 1 gig early October 2015.It depleted within 2 weeks . I have since been asking MTN to send me some kind of report as I do not understand why my data is depleting so quickly. 3 weeks later I still don't have it. The call center people keep saying logs have been booked for this request but I still have nothing! To date I have spoken to 6 consultants and each one has a different process of how this will be done. I am 100% sure that this extra cost will be in in my next invoice, that's fine. I just need to get the report! I don't want my money back, I just need to understand my expenditure, that's all!!!!