Mtn has no customer service

Hi everyone I am a mtn user for many years and have experienced a tragic armed ******* on the 6th of april because I'm a store manager I was held at gun point and my phone was taken. so I went to the Mtn Musgrave centre situated in Durban to do a Sim swop for my contract sim and spoke to a consultant named Melanie which advised me they are having trouble with the system and the Sim swop will be done latest on the 10th April and I have been patient with them so on the 11th of April I call mtn call centre and spoke to Jabulani who told me it's not a connectivity problem and I must go back to the branch. So I explained to them that the agents called me and gave me security codes for the upgrades and notified me any way this guy Jabulani started to give me different answers which contradicted himself and I saw he was lying and requested to speak to his superior which was in a "meeting" and they could not provide any one else in charge. Any way wasting 45 minutes of my life I called again and spoke to again agent from mtn named Andile which promised to help me and acts like the line is breaking and cuts the call and don't have the decency to call back. So I called again and spoke to a lady named Charmaine and explained to her for the third time and requested for her superior and she stated her manager is not in. And she stated that she will send an email which will take her 2 seconds and in 48hrs it will be sorted out. People I did the Sim swop on the 8th of April did my follow ups and today is the 14th April and its not done and not one call from 1 manager from mtn