This place that you took it were only doing their job, and it was only right to do so.
If you have any problems with your xbox, it is only natural to contact microsoft to go about this.
Q: When and how are you going to pick a winner?
A: We'll randomly pick three US and two UK winners out from all the tickets earned on the site. The more tickets you have, the more likely you are to win!
Q: I live in ... Can I enter this competition?
A: As long as you live in the UK.
LOL...
Also, something the game trade-in thing that they don't tell you is, you have to put down a £20 deposit, to declare a console, and then when it's released, you can trade in your console.
I picked up a leaflet earlier on in game, which show's how much they'll give you for trade-in value. (Don't know how old this is.)
Super elite 250gb: £150
Arcade: £70
Core: £50
Network adapter: £20
It'll obviously be a black console, with the 120gb hard-drive.
They'll only give you what they'll give you for a 360 (minus 20gb harddrive) and then buy the 120gb hard-drive seperately.