Speak to Retentions on 202 (choose the thinking of leaving o2) and see what they can do.
They are great guys and norm go out of the way to help
Need Help, Just ask. We are one big Family here in the o2 Forum.
Use iPhone XS Max dual sim, SE, Honor 10, IPad Pro 11, Apple Watch 4 LTE, 100+ Mpbs Barrier and a Record Player.