If you want your Virgin number on O2 you need to call Virgin and ask for a PAC code.
Once you have the PAC, call O2 and give them the code and the phone number you want to be moved to O2.
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)