Calling not working

Joined yesterday had a few messages saying switching has happened but phone calls not working, how long does it take to switch over, are there settings that I need to adapt having just switched from O2

When did your number port.
Have you rebooted phone.

I have done that Ty

Still don’t seem to have switched over, is it because I was connected via eSIM with O2 maybe, O2 are still showing as network provider for me and it doesn’t change if I try to override????