Our domains are blocked. Our Facebook page is not in violation, and getting a response from Facebook to correct it is impossible. How do we get Facebook to unblock the domains? We've sent several messages to the "If you think this is an error, let us know" panel on the Facebook Debugger page. Please help.
The only way to get your domain unblocked is through the Facebook Debugger, exactly as you described. I think the only thing you can do is wait for a reviewer to check your appeal.