Bad service with Sim swap

I have had the worst Service ever with this Network provider, i have tried to do sim swap for the past 36 hours and it seems like no1 knows what they are doing, I have been using this network for more than 15 years, but the treatment that i have received from the call Centre consultant is disgusting, My cellphone number is still ringing and MTN consultant have advised that they can't anything to help me with sim swap, i called MTN on Monday morning to do a sim swap and i was told it will take 2 to 24 hours to process the sim swap, and when i called on Tuesday i was told that the sim swap failed, and the consultant said she is assisting with doing a sim swap again and it will take 2 to 24 hours to process the sim card, after 24 hours which is Wednesday the sim swap was not processed, i called the call Centre and the consultant told me the sim swap was done, however my phone was still not picking up the cell number that i requested the sim swap for, so when i told the consultant that he said he will have to perform sim swap again, and after few minutes he told me that i failed authentication, how many times must i be authenticated and be told the same nonsense, if MTN does not want to assist with a sim swap they must say so, if i am able to make a sim swap the 1st thing i am going to do is to port out this number to another network.