Bad service I received from Mtn branches.

I have been trying to get my number replaced since Sunday , my phone got ****** last week I went to Westgate branch on Sunday requesting to do sim swap which I was charged amount of R50 for it and I was told to allow 24hrs which I did .yesterday called Mtn customer help line which I was told the status of the sim swap is pending & I have to visit nearest Mtn branch which I went to Randburg Mtn branch where I was told the same thing and was advised to go back to teh very same branch I did teh sim or call them in which I requested their help with calling them which they refused .I had to yet be inconvenience used my airtime called the Westgate branch spoke to Wissel who told me my sim swap was unsuccessful I need to bring affidavit plus certified Id copy ( that's when I lost it what ****py service is that for their mistake) no ways I just don't understand what Mtn treat their customers like this .Its Wednesday now m yet to get assisted with the sim swap all because I want my same number that I have been using for 10 years .M so disappointed with the level of incompetency and bad customer service that Mtn given its customers.