My line is not working

Moved to the Uk and my isnt working again

Though, it's a new phone.I've made all necessary changes and settings but it's still not working.

I'm looking for a customer Care representative work, if my office can be using to restore people's MTN line back and do be doing their sim registration and welcome,I will...

Am in the US I use to receive text with my MTN line , now I no longer. And it looked like my number no longer works.