Unable to do a sim swap over a month

I'm utterly disgusted and disappointed at the service of the call centre staff who are not knowledgeable as to what is needed for one to do a sim swap. I've phoned several times over the past month to date wanting to do sim swap and have been sent from pillar to post. Initially they told me I only needed an affidavit sent to them confirming and validating that the number is mine, have since been told I need an ID copy and as well that the new number pack to do the sim on needed to be on the affidavit. I've asked for the supervisor (Amy) and was left hanging for a very long time and she eventually took my call and tried to help me. Will have to wait and see if the sim swap will be successful. I'm so annoyed because I've been with MTN for over 10 years and this was the treatment I got.