MTN Ridiculous Service

I have been billed with a excessive amount for data usage in June 2015. I have logged a query for this bill, but has not received any satisfactory evidence that the expenses are true. I have logged numerous calls with MTN for months and no one seems to be able to give me an answer. As a service provider they should be able to provide me with the evidence of what the account is for, and not just the amount of data that has been used. Through the office of the chief customer experience officer, represented by Farhaana Hendricks, I have received limited information to satisfy the claim of the data used. I am yet to receive a response back from this person on queries I have raised almost a month ago. It seems that I am being ignored as a customer. I am not just any customer, as I am pretty sure that I am one of those customers that have been for years in the top paying category that enables MTN to pay the salaries if such said staff members. After all as the designation says, from the OFFICE OF THE CHIEF CUSTOMER EXPERIENCE OFFICER. This experience is evident that MTN has no regards to customers, just a corporate that don't care. Ridiculous to think that they expect loyalty.