But figuring it out would be easy too...call the customer service group. Its the only number they have. 1 Vonage Help.
This doesn't solve the transfer issue. However, you can use the service for outbound and inbound with the temp number till the transfer happens. Not a full blown test...but enough.
The router thing really sucks. Hard to pin the failure on them...easy to pin any crap about the replacement on them though. But, you could always take it up with Linksys.
They were pretty thorough telling me I'd be on the hook for equipment anytime in the first 12 months should I cancel.
Sounds like you've had a comedy of errors that you are laying completely at their feet.