MTN-********** & *********** service for contract client

If there was anything below 1 star for their service I would give them that. I've upgraded to a contract and have been unable to access my voice mail box. All I get is "Sorry your request cannot be completed at the moment". I've called and logged the issue multiple times, and they open the query, then it gets closed without resolution. Each time the customer care person does something (reset, etc) they mess something else up. I was just told that my mailbox was deactivated, they reactivated it and I am now getting messages that they've added something to my account and new monthly payment is R199.***?! I am furious beyond words as none of my requests are escalated by the customer services gatekeepers. MTN your service is ********** and your call centre staff are ill equipped to do their job. Your info on website is not helpful either. Very disappointment client who hopes that this way they may resolve the issue