Sim Swop not happening

I have been promised that a sim swop will take 2-24 hours. I am now on 50 hours and still nothing. I phoned the CC and they indicated that the sim swop is not registered on the system and promised me another 2-24 hours. Needless to say this also passed without any result. I contacted the branch this morning and they logged a query, promising to come back to me when they receive feedback. Heard nothing from them, they do not answer their phones and I have been holding for 20 minutes now trying to get through to the Call Centre. MTN is so useless that I really at a loss of words to describe them.