Even mtn staff say USE HELLO PETER for a response!

My contract was due to end on 11 mar '15 and for the last 3 months mtn overfilled me x3 for data. When I requested a usn report, they agreed and credited me for part of the data charges. Now they owe me one last report for the last month. I have requested this 4 times on separate occasions and have received ref numbers...but no report! The last month in question they removed my debit order details and requested a cash payment. In all fairness, I am not paying until I get my data report. Now am on prepaid since contract is over. No one at blue route mtn or the call centre can \trace"the history since my number has changed to prepaid and I AMA being threatened with being suspended!!! This is ridiculous! Held for over an hour today on the 808 line and call was then dropped. Staff say they experience same thing if we come into their shop. This is pathetic! All I want is Ann explanation for my data and I will pay gladly. Been with mtn for over 10 years but itching to change right now. """