MTN didnt port my number as asked!!!!!

I was contacted by MTN direct to take out a new contract. I agreed to taking a contract but only if they ported by Vodacom prepaid number to the contract. This was all agreed telephonically AND RECORDED. I received a phone and SIM card and that is when the nightmare began. MTN did not listen to my request and activated a new number for the contract without porting my number as requested. I have tried since May 2020 to get my number ported and still have NOT been helped. I have even asked friends who work at MTN to help but they have said they hit dead ends. I want my prepaid number ported to the new contract. Is it that difficult to get help as emails/calls/everything else doesnt work!