@Thomas4If you go to this page it should help you
https://www.o2.co.uk/help/phones-sims-and-devices/unblock-your-phoneIf not you will need to contact customer services on 4445
--
iPhone 16 Pro Max - o2 and Spusu
Galaxy Z Fold 6 - Mozillion
iPad Pro 11 M4 - Three
--
This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company