Sim inactive

Good day <br> <br> I did a Sim-Swap with Mtn Festival mall on the 10th of March. I was told the sim card will be active in 24 hours or less. after 24 hours, I tried to insert the Sim card it does not read and I get a insert simcard /SOS massage. I tried calling the mtn 808 number countless time to no successes. I keep being told they are experiencing high call volumes. I called the store (festival mall) and I keep being told they've logged the service call to MTN to reconnect. I waited another day, and nothing happened. I was then told to wait for another 24 hours as they have requested the reconnection again. I waited and nothing happened, still getting the same massage. today the (12th of March) I finally got through to the 808 number and a lady said she has rebooted the system for the 3rd time now. but still my sim is not working, it cant connect. ive been waiting for 3 days without connection, ive lost immense business as I use this phone for work. and MTN has offered me no help and an immense headache. I am on contract with them and to me this is a serious infringement of my contract agreement with them. ive been very patient with them, Please assist.