SHUT DOWN MTN - USELESS SERVICE PROVIDER

I am utterly and completely disgusted and disappointed in MTN. I've been a loyal customer for almost 20 years and today they decide to suspend my pre-paid line without any warning. First off, how do you suspend a pre-paid line? Then, when I eventually get a hold of them, after many attempts to get assistance and 2 customer service people later, did they tell me that my line was suspended due to suspicion on ********** activity. What ***** are you suspecting? None of them can tell me until, hopefully, tomorrow morning because their ***** department has knocked off and will only attend to me tomorrow. in the meantime, i'm dealing with a family emergency and a massive work deal that I had to attend to but now I can't because I have no phone! I am sick and tired of MTN's HORRIFIC SERVICE. THIS NETWORK MUST JUST BE SHUT DOWN. I'm porting to VODACOM.