Please release custom domain "1billionpartners.com" (orphaned reservation, already in use)

Hello Netlify Support,

I’m trying to add my custom domain 1billionpartners.com to my site celebrated-dolphin-e2d576.netlify.app (team: sunghee-45dkzy8), but I get the error: “Another project is already using this domain. Domains must be unique across Netlify.”

I’ve checked all of my own accounts/teams and the domain is not attached to any site or DNS zone I can see. I believe it is an orphaned reservation from a Netlify site I deleted earlier this year when I migrated hosting.

I own and control this domain (DNS is managed by me in Cloudflare). To verify ownership, I have added a TXT record with Name verified-for-netlify and Value celebrated-dolphin-e2d576.netlify.app.

Could you please release or disassociate 1billionpartners.com so I can add it to my site? I’m happy to provide any further verification. Thank you very much!

Sung-hee Choi, 1Billion Partners