In the Guidelines:
Giveaways should accurately reflect the game being given away. If the game is not available in the giveaway list, please contact support to have the game added, instead of posting the giveaway under an incorrect name.

In the FAQ:
When viewing your giveaway, you'll see a button with the name Delete Giveaway in the left column. Clicking this button will let you specify a reason for the deletion, and it'll walk you through the process of creating a support ticket. If the giveaway is still open, the ticket will be automatically approved and the giveaway removed. If the giveaway has already ended, then the ticket will need to be approved by a member of support.

Yeah, you're new here. That's not an excuse for giving away a "false" game. Welcome to the site and hope you'll have fun. BTW, I haven't blacklisted or reported you but it doesn't mean someone else won't.

I'm afraid this would end up as a non-activated win, if the giveaway and the game sent don't exactly match with each other.

That's a good reason TO read the rules, not a good reason to have not read them.