I eventually got a reply from O2, after another email through the website:
I have checked your account and can find no record of the handset being returned. Please fax the proof of postage on to us and I will investigate further. The fax number is 0161 705 2508.
So I faxed them…and guess what. The number didn’t work. It’s just a recorded message saying that the person is out of the office. I’ll try it again later, maybe you can only fax when they’re in, or something. If not, I’ll post it to them. Hopefully it won’t get lost en route 🙂
Have a good trip back, Nod! Hopefully see you tomorrow / Sat.