Did not upgrad contract - now number blocked

I had a contract with Altech Autopage, contract ended, so Altech removed from their network & ported me to MTN. My number is an MTN number. Since then, my number has been blocked, I cannot make calls, send smses or access my data - I have no network access. I am beyond angry at this point, it has been 7 days. I've been calling the call centre on 173 everyday & told to wait 24 hrs each time, as different people are telling me different things. Was told my number is active, but I need to re-Rica it again, so I did. That didn't help. I eventually went to an MTN store at Eastrand Mall & was told to do a simswap, the swap was successful, but the problem remains - I have no network. Tried to call 173 again & told that I've reached my max calls for the month. Last reference no I received was SMC*** & was told to wait 72 hours, as it was referred to Engineering dept, when I call & quote the ref no, no one can assist me with it. It seems I'm being punished for not upgrading an MTN contract. This has affected business & completely disrupted my life, literally at a standstill. Appalled & infuriated at this not being resolved. I NEED TO USE MY NUMBER! Worst service I've ever received.