What happens if someone doesn't press received on my giveaway?

Wait 7 days, then file a ticket. Either it'll be re-rolled if they didn't activate it, or marked as received if they did.. with some other grey area stuff for, well, grey areas lol

According to the rules, you have to wait for 7 days. After that time, you can ask for a reroll for a new winner c: Hope that helps

If "received" is not pressed it does not count to your level. As mentioned above you can file a support ticket then, to mark it received.
Please keep different time zones in mind, most users will mark wins received within 24 hours.

you can force the ga marked as received if 7 days passed. send a support ticket in the category request received feedback. :3

i think the game has to be activated by the winner, or you need proof you sent the gift/key.