I don't call a 72-hour response rate particularly impressive considering you're not exactly the worlds largest company and inundated with countless emails a day.
No, but we do answer our email, even if it is a bit delayed now and then during large releases or technical problems with our CRM software (we're working with the vendor to get that fixed right now). There are many software companies, especially game companies, that don't even answer email.
You also can call sales, or get on irc and ask for somebody in sales. They will work over a private message to solve the problem.