SIM Swap

I have been trying to do a sim swap with MTN without success. I initially went to their branch at Boulders in Midrand, purchased a sim card and performed a sim swap in store. I was told to wait 24hours, I did, but my phone did not work. I contacted their call centre, and the process was restarted from scratch. I waited a further 24 hours, my sim card worked within a couple of hours but that was shortlived. I woke up on the 3rd of Sept to find that my number was disconnected and I was receiving another person's calls on my phone. I contacted the call centre again, no one could explain what was going on, I was told to wait another 24hours and my number would be reconnected. It was not. I finally managed to speak to a supervisor by the name of Ntokozo Makhubo on 05th Sept and she managed to reconnect my number. She promised that my phone would be working within 24hours. It did not. I contacted her again, she advised me to buy another sim card and restart the sim swap process, I did that and I forwarded all the details that she needed, that was on the 8th Sept. Today is the 14th, I have been calling their call centre everyday since then, but I still do not a have a working number.