Well, first off .... a company like Web Assist should actually at least reply to e-mails to the sales department. Thats just plain business 101.
Second ... the 800 number apparently does not work from Canada.
So I guess it comes down to if you want to contact sales you are best off e-mailing them asking about purchasing something first and then slip in the real request. Seriously ... is it that hard for sales to reply to an e-mail?
Wow ... just wow.