Transfer of old number to new account

My iPhone still shows temporary Lebara number after transfer of old number from previous provider confirmed. I have switched off FaceTime and iMessage and restarted phone but still can’t see transferred number. What have I missed?

I’ve had this problem for over a week now. iMessage and FaceTime show previous number, yet I can call and text to/from my ported number.

My phone, and the data settings too, show the old number.

I’ve called Lebara 6 times. All they say is turn it off and on again.

So I had them send me a replacement SIM card. Still not working.

Now I think I need to leave Lebara to get this sorted.

Lebara say it’s a device problem, even though my son’s phone has the exact same issue.