This "Google has no support" is a myth that I see consistently repeated on Hacker News that I can't understand it's repeated. Google's support situation is actually the same as Microsoft's: if you pay (i.e. have a Google Apps for Business) account, you get 24/7 phone support. I'm pretty sure that it's for any service linked to your Google Apps for Business account (including Voice), but not completely sure since I've never had to use it.

You can find it here: http://support.google.com/a/bin/request.py