I've just been to store. Lucky got the manager, he didn't seem to know anything about the unique code, after looking it up discovered it should have been on the box, and that I'd have to email customer services about it. I explained I had already emailed and called, without getting anywhere, so he called them for me. After what seemed like a long time of waiting around and explaining the situation he was given the information that this sticker was missing from a lot of the boxes, and they were going to text people the code in due course. He rightly brought up how they would text me when it was a handset-only purchase, I don't know what the response was to this but he gave him my mobile number and confirmed the order number. So all I can do now it wait and see if this text message ever arrives.
Considering what Nokia / the company behind the upgrade website have told people about the limited number of codes, it sounds to me like CW ran out and are trying to source more to then text customers. Maybe Nokia only want to release so many at one time to stagier the claims. Just a thought.
It's such a messed up, if they only had a set number of codes they should remove the promo from the website and store posters. I await my text but I'm not holding my breath.