The problem is that you have the wrong data bolt on.
When you get home, you need to call O2 on 202 and ask them to change your data to iData for iPhone and then reset your network settings, but don't do this until you get home.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion.
This is not Customer Service so we are unable to help with account specific issues.Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)