i won a giveaway and the key isnt there, is it bugged?

Is the trophy icon flashing? If not, then that means the creator hasn't sent the key yet.

^ That. The winner has a full week to deliver the gift. Gifts need to be sent manually, so it's perfectly routine to expect anything from a few hours to a couple of days.

You can find more information on the FAQ, under "If I win a game, when can I expect to receive it?".

just wait for the creator of the giveaway to put the key...