Bad service

I have been with MTN, using same number for more than 15years,but the service that I got from MTN after my sim got damaged, was extremely terrible. Firstly I went to MTN shop in Heidelberg mall, was told to get affidavit, which I gave them with all other documents they needed, the guy asked security questions after I was told that I will not be asked security questions if I go to the stores with the documents, after failing security questions, he then decided to scan the documents and told me not to use the new sim till the following day after 14:00

Following day I tested the sim, the old number was not swapped, call the customer centre was taken from pillar to post, then someone told that the affidavit did not have the new number, after all the trouble I had to go through, nobody even bothered to tell me what should be the contents on the affidavit.

I have never felt such ill treatment from any network service provider.Much as I would like to continue using my old number, it's stressful to do a sim swap with MTN period.