*****ALENT SIM SWOP

.I have a huge problem with regards to MTN network . I received a phone call on Wednesday 23rd of Mat 2018 from a gentleman who claimed their calling from MTN Head office advising I have been a loyal customer for years MTN is running a promotion and giving away loyal customers a phone of their choice from an Mtn or pep store at any branch , the gentleman asked me if I have been using my number for years I said yes I have been and he said MTN is giving away a phone to me , next thing after a few hours my number stopped working and went to emergency calls and there was no network. Yesterday the 24th of May in the morning as I had tried numerous times to restart my phone to get a network and due to failure I called MTN to find out what is happening . I was advised by one of the consultants that my number is working as normal I should restart my phone after 2mins and I will get the network . I tried again but that did not work . Later in the afternoon around 2pm I called MTN advising that I suspect something is going on with my sim card and I want to verify if there was any activity, one of the consultants then said I did a sim swap in the morning . That was a shock as I did not perform any sim swap I advised her that it was not me , someone did it and she just said I should sim swap to get my number back (no help whatsoever ). Later in the evening I called MTN spoke to one consultant who was extremely rude I explained that someone is using my number and someone not me performed a sim swap and I want to sim swap to get my own number back , I had to go through your security questions which I was advised I failed and sim swap could not be performed . My question of that failure was the that : 1. Someone is using my number 2. of course their chances of me failing your security question as I am not the last person who used it 3. i do not know if any airtime was loaded or who was called using that number 4. I am not in possession of number its sim swapped But I cannot get my number back as I have been using it for years . due to this unfortunate circumstance what I am I supposed to do , how does MTN help a customer who got ****med and how does someone sim swap my mtn number easy like that and nothing is done. I would like urgent assistance as this could be detrimental for me ,otherwise I am taking this matter further.