All I want to do is close my account. Unfortunately, Vonage doesn't allow you to close your account from their web site. They make you call them in order to give one of their silver-tongued customer service representatives a chance to talk you out of your decision. This is annoying in its own right, but they are only open weekdays and only until 6pm Pacific Time. Which, given my schedule, means that they are always closed whenever I try to call them.
Normally in this situation, I find it easier to write a quick letter and mail it. But after spending quite a bit of time on their web site, they seem to be almost purposefully hiding their mailing address from their customers.
At this point, I would recommend staying away from Vonage. Regardless of what you think of their service from a technical or quality perspective, their customer support is terrible. And I'm sure, like me, you don't like being held hostage when you try to cancel your service!