I did some oppsie

Click on the the little downwards arrow next to the "Support" button in the upper menue bar, select "Delete giveaway" and follow the instructions. Done.
Btw I don't see any giveaway from you. Did you already figure it out for yourself??

0 giveaways from Halto

That aside, I'd highly recommend you go through the Guidelines and the FAQ in their entirety.
Welcome to Steamgifts. You can use the the orphan or anti-ninja keydrop threads if you don't need your GOG key, if you want. I personally recommend the latter, but it's up to you.

Bem-vindo! :D

Agora, essa "Ilha dos Cocos" seria aquela que fica ali em Paraty? :D :D :D

Abraco!

I already talked to the support, thanks to everyone that helped me!