Didnt get a CD key when i Purchased the game

[Menteltom999]

Today i went into my local game shop to purchase Men of war Assault squad and i bought the game for £15 and when i got out of the shop i opend it up to make sure everything was there just in case i had to take it back and i soon realised that i didnt have a CD key with the game and i looked on the back of the book nothing there so i took it back in and i asked if i could have a refund of my money and they said no i cant becasue of virsus risks and i was like wtf ive just opend it up outside and now i cant take it back so i cant play muiltplayer so i feel abit ripped off so if you could help me get a CD key so i can play the muiltplayer it would be brilliant thx