Blocked sim after i cancelled airtime contract

I cancelled 121 airtime contract with TFG and i was advise that they will make provisioning for my nr to be back on pre paid. this is my own sim/ nr that i had for over 5 years. i spoke to Karabo who said it will take 24 hours to get my nr back on prepaid. in the mean time i lost my sim and i was advised to buy a new sim from TFG store Rica in-store and call 121 from there so they can call MTN to do a sim swop. then i waited another 24 hours nothing happened. MTN advised that 121 had to tell me that if i don't use the new sim within 24 hours i had to buy a new one. I went to 121 call centre on a Saturday asked to speak to a consultant but no one wanna to face me. Byron the supervisor said i must listen to him as the fault lies with MTN. i now have to make certified ID copies an affidavit send to MTN as they said that my own nr is RICA barred. its been 3 months now and i still dont have my own nr back. What do i have to do to get service from TFG this is bad service and they are ******