Voicemail service unresolved

on the 23rd of September my contract was upgraded, since then my voicemail has been non -functional, I receive notification that I have messages but when I dial 100 it redirects me to 112 Emergency number, I spoke to Katlego at call centre who did the whole trouble shooting process with no success, he then opted to log a call with the networks department (27th Sep-2015), Tuesday 29th it was still not resolved, I spoke to Andile(call centre) who couldn't help me until I requested his senior, in comes Fezile (Supervisor- Call centre 14th Avenue) who promised me that he will escalate the matter and call me for progress, needless to say that each time I had to call in to find out what's the progress if any, today it's the 2nd of October 2015, and the problem is still not resolved and nobody has had the decency to even inform me of what the problem is, I have 8 vmail messages that I can't retrieve (Mostly clients),it took me some thinking before I decided to stay with MTN because of the **** network and service, now a week after upgrading (against my better judgement) I am dealing with this.<br> <br> Terrible service, I regret upgrading.<br> <br> T