Heyo, Googler here. Can you shoot me an email to with your domain information? I'll forward it where I can and hope we can figure out what's going on. I unfortunately can promise anything, but I'll try my hardest! Disc: I work at Google, but not near Domains. EDIT: removed email as I got the info I needed!
But I'd have to say that it is absolutely shameful that desperate businesses have to try and hope to get noticed on social media to get a problem resolved. We all know that this is true. Not having responsive customer support is the way a scam operates, not a legitimate business.
Offer a paid customer support line if you must to reduce requests to a manageable number, but Google is absolutely killing off many innocent small businesses with the way they operate. Especially in these troubled economic times, it's absolutely horrific behavior.