********** sim swap

I have had this number for years. Now someone did a sim swap on the 23/01/2019 while my number was still working, want to know who did the sim swap and what procedure was folloewed, how? then my number lost network. I called MTN to ask what then problem could be and was told to go to the nearest branch so they can check what could be the problem but when I got to the festival mall branch on the 26th they said I have to buy a new sim but could not as I did not have my ID. I only bought a sim on the 28th and was told it will take about 24hrs before I get my number back. On the 3rd day I recharged the number thinking its back in use but was not. I called MTN again and they told me the number wasn't activated and that I have to buy another sim card to do a swap. I bought it and was told I gave them wrong info and will have to call again with the correct info, when I did that the guy from MTN told me a sim cannot not be swapped more than 3 times within 6 months. he said the only way to do that I will have to go to the police and do an affidavit saying I need that number as it belonged to me. Because of this inconvenience I lost money from my bank account and would like MTN to investigate how the number was swapped and by who and I need that number back. I have also opened the case with the police but unfortunately the police said I cannot I have to followup from my side with the service provider and give them feedback, gosh how long are we going to be *****ed in our country before justice protects us.. I need a report as soon as possible. **********