Horrible Service!!

My phone was ****** on the 27th April 2016. I reported the phone as ****** at mtn Clearwater mall. The consultant did not notify me that the phone had to be blacklisted via the call centre! I requested a sim swap on the 28th April 2016. Sim card was not activated, I went to mtn westgate on the 30th April 2016, where I was told that the sim card would be activated, which it was not! I went back to mtn Clearwater yesterday (2 May 2016) and I was told that the individuals who activate sim cards were not working because it was a public holiday. They promised to have it activated this morning and would call me to notify me once done. I have not received a phonecall and my sim card has not been activated!! I have attempted to call the store and the phone never even rings. The service I have received from mtn is unacceptable!!