How to cancel an accidentally created Giveaway?

Hi... I accidentally created a Giveaway of an expensive game that I don't want to go through with, I only just signed up to the site and wasn't clear on what it meant to 'Create a Giveaway' and accidentally started one for Dead Island which is an expensive game and I'm out of a Job at the moment.

I started the giveaway thinking that maybe I could win the game because that's a game that I wanted because I couldn't afford it, but stupid me I should have realised how the site works, but yeah, now I just feel like a complete fool... but I don't want to have the person winning to just not get the game and receive negative feedback.

And I can't figure out how to cancel a giveaway anywhere!?!? Can someone please enlighten me? Surely there must be a way to cancel?