Is there a way to contact Admin of Steamgift?

i think you can just put all the keys into the box, but you need a higher steam gifts level to be able to giveaway more games at any one time

You don't need an admin, any mod can give you more slots for a big giveaway to begin with.

You will get an answer to your ticket sooner or later. There is a high number of open tickets so it might take a bit more time. If you don't want to wait you can start with what you're allowed to do (should be around 20 giveaways at the moment) and do the rest later.

I am all good now. Let's start the gift now! :)