I run a domain registrar. "serverHold" is not a status that iwantmyname could've set. If they had suspended the domain it'd have "clientHold" set. Server Hold means the registry (i.e. .io directly) has suspended the domain. Your best bet would be to contact the Internet Computer Bureau Ltd who run .io at [email protected], or the registry technical support provider Identity Digital at [email protected].
I've heard a ton of stories about .io, IMO, they play fast and loose in a space where that isn't okay, and they get away with it mostly because they are a ccTLD.
The last time someone I knew had an issue, they had to get a senator to make waves to get anything resolved.
What registrar do you run?
Interesting, this morning I got a response from a staff member of the parent company that owns iwantmyname saying they didn't get my response with regards to the abuse notification they sent and that's why they took the domain down.