Sorry you're having trouble.
When you select "Moderate," that should move the comment into the "Pending" section of your comments. Is it showing there? I'm unaware of an "unmoderate" option. There is an "unapprove" option, which may have moved it into your spam section.
Take a look in those areas (pending and spam) and if it's not there...it's gone for good!
Sorry! Let me know how it goes!
Thanks,
Elise
