how can i delete my giveaway?

Create a support ticket.

Press Report button and write to Support.

You can't once it's created. Your best bet would be to contact support and explain the situation. I'm new my self, so I don't know if they will even remove it.

buy the game and gift it

here

Lemme guess: All giveaways aren´t legit you made?

I mean, HOW?! It´s not like they´re asking 20 times if you´re sure or something...

You have to give away those games. If not, policemen will come and arrest you!

He tried it on lara croft,and though he would get game if giveaway is started,and tried lara croft again,failed,spotted activision hits,tried,he though this game is bugged or out of stock,so spotted battlefield 3.Idiot.