Is the funds for international calling? All USA/Canada calling is free, so I'm not getting why a minor hiccup has you on edge. You appear paranoid based on all your recent GV related post. Take a deep breath and a chill pill

Google has no customer support.
now I feel like an idiot for having just added another $20 to my Google Voice account.

go to the Google Voice forum and you'll see today's problem is now spreading from
North Carolina, Florida, and all the way to Ohio...
sorry. forgot to provide the link: (copy the whole link)
https://productforums.google.com/forum/?fromgroups=#!categories/voice/making-and-receiving-calls