Simcard not working

I have been calling and emailing Rain, in order to get assistance with my 5g simcard that does not work in the router or any other device. I have explicitly explained this to them, however they keep insisting I do a basic troubleshooting to get it to work. It does not work, the problem is the simcard and they need to replace it. I work from home, so this is a great inconvenience. Rain please assist asap