no feedback ? what to do

From the FAQ https://www.steamgifts.com/about/faq

The winner has not redeemed my gift, and I'm unable to get into contact with them. How do I proceed?

If you've been unable to reach the winner of your giveaway using e-mail and Steam
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after seven days of your giveaway ending
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, and they have not yet activated or redeemed any keys or gifts you attempted to send, please contact support to request a new winner. When creating a ticket, we ask you to include data that suggests you made an adequate attempt to contact the winner, such as screenshots of e-mails, friend requests, or gifts pending on Steam. If the request is approved, a new winner will be generated by the site.

The winner has 7 days from the time it ended to activate and mark the giveaway.
Be patient. :)

send a request received feedback ticket after 7 days.

seems he either doesn't care about his win here, or he doesn't know you're from sg (it happened to me years ago).
you could also try to find a comment from him here or in a giveaways and post there.

alright i will wait a few days more then