Shocking lack of Service

There was ********** usage on my data contract on 17th March 2015. I called the call centre to report. I don't have an mtn voice contract so the call was a billed call. I waited for 20 mins before i got through to a pleasant call centre agent. But he could not help me as the bill cycle needed to be completed before validation of the ********** data usage could be done. After explaining my irritation regarding this process He advised me that i would have to call back the next day to check if the system could provide further information. He also gave me his email address. I have tried calling back with no luck. My mails to every email adress i could find go unanswered. And the worst part of it all is that the ********** activity on my account has depleted my data so I can't work when i need to. I'm too afraid to load more data on as there is clearly a problem on my account. MTN's lack of response/ interest in my problem is unacceptable. In various occasions i have waited up to even 1 hour for a call centre agent to answer my call. At times i was even cut off after holding on for long periods of time. The data connection can also be extremely poor at times. Don't support MTN