I love 800Notes, when I get a call like I did from 6502044375, I ignore it, then plug it in to Yahoo search and it comes up here with complaints! Then I simply go to Vonage and block the #.
Had the same exact experience, with headset trouble and all. When they didn't state the company name, I automatically saw a red flag and hung up when they were transferring me to a "travel specialist". Caller blocked.