Will I get a pre-order bonus now that I've preordered Transformers: Dark of the Moon for Xbox 360 from Amazon?

I've just pre-ordered a copy of Transformers: Revenge of the Fallen for Xbox 360 in the UK from Amazon. I was a bit worried that I wouldn't get a bonus because a site mentioned Amazon pre- orderers getting a DLC download code, but when I went to GAME.co.uk, I saw a disc cover with a sticker saying "Includes Sideswipe Pre-Order Bonus" but I didn't see a sticker on Amazon. Am I getting anything? If not, can anyone give me a free pre-order code for best answer.