After much arguing with O2 eventually I got a hold someone who works at O2 that wasn’t a clueless idiot and they agreed that they could manually change the tariff to the 5G advertised tariff of Unlimited everything …
Oh O2. You may have been technically the last network to switch on your 5G network but it turns out one mast of yours is right beside where I live and thus, I should get a perfect signal. How wonderful …