Oh, you think Vonage is bad? Have a gander at cancelling through Packet8:
After that, I dusted off my old Vonage ATA from a while back, swallowed my pride and had it reactivated, and have not look back. All because I was a cheapskate and wanted to save an extra $5 a month for unlimited calls. I've got a cell phone with free LD too and it does have plenty of extra minutes at the end of every month, but frankly, I prefer the sound quality of a VoIP call (which at its most minimal takes up around 15-30kpbs of bandwidth) to a cell call (which tops out at 13kbps in rare instances, but you're typically lucky to get around 8kbps and tyou can HEAR the difference). I don't think I'll ever dump my cell phone, and am glad to have it when I'm out and about, but if a VoIP or landline phone is nearby, then I'll still use it.
E-mail fudged to thwart spammers. Transpose the c's and a's in my e-mail address to reply.