Looks like you should contact the sales team as they can help with that – message them on Social Media using the link just below this post, @Flori198. Or you can call them on 0800 081 0255 free from any phone in the UK.
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)