Number stopped working

[Joeship]

Changed over from another provider 2 months ago, ported my number across no issues but now all of a sudden my phone is sending messages from the temporary number rather than my actual number I can't change it back and my FaceTime for my actual number is also no longer working. I've tried going in my settings to change the number but when I change it, it won't allow me to save it and resets to the temporary number

Anyone know how do I fix this issue?

[caesarome]

@Joeship 

It might be worth ordering a replacement sim as that should come with the correct transferred number:

https://www.sky.com/help/articles/replacement-sim