extremely frustrated at mtn

After my phone was ******. Insurance paid out and I went to mtn glenfair to do a sim swop. Already insurance took a few weeks to replace my phone I am still waiting longer to get my phone to work. On the 17th August nadine gave me a new nano simcard. After telling me that it takes 2-24hrs for my phone to be in full operation it is now 5 days tomorrow. And my sim card is still not working. After driving in the traffic 4 times with huge frustration I was told by her that my sim card is damaged and she would call me today to tell me the status of the technical dept. Which I still don't understand. What has technical dept have to do with a sim card that doesn't work? Instead of just giving me another sim card. I am 100% dependant on my cell phone because all my adverti*****ts. Clients. Lawyers . Banks need to get hold of me for my business. I'd love to see when il be getting my phone to work again.