I'm not on the attendance event winner list.

I participated in the attendance event. I happened to see the winner list today, but my nickname isn't there. I wrote 6 posts and more than 10 comments as per the instructions, but I'm not on the winner list. How can I check this?

I inquired via KakaoTalk, but now I want to submit an inquiry on the website. Where on the website should I submit an inquiry?