Downright pathetic and insulting service

I have stopped my contract with MTN prematurely as I am relocation overseas. I was then imformed that I would have to pay a fee for this, which I did within 10 minutes of receiving my salary, which shows my commitment. I then asked for my number to be migrated to Prepaid, which was accepted by both parties. I was told that I would have to wait 2-48 hours, which I was willing to do. However, I'm on Day 5 today...I went to two MTN stores, both phoned Customer Service and I spend time trying to get things done, only to be told that my case is under investigation. Another call gave me hope, but I got cut off as i was being transferred in the middle of my call from the store. Now, I respect that they want to improve and better their mistakes, but where does it leave me, the customer? I can't access email, which I badly need, nor Whatsapp to stay in contact with my new employer...I can't text or phone...what do I do?? Now, I want to know...how is a mistake MTN staff made, my problem?? They're investigating and I can't work...so, what now? I now get in trouble and behind with my work, because they have to investigate a mistake they made?? Thus, I'm venting here and everywhere else possible, showing that MTN is, after many years of loyalty and prompt payments, disposing me and treating me worse than someone who hasn't been paying them at all. MTN, I'm insulted and disgusted, and rest assured, after this, you have lost me as a customer when I return to South Africa. I will now wait to be switched back into the grid and use it until I leave...after that I'm done with you.