Here is the exact screen in question: http://i.imgur.com/PDvPcwU.png
Note the two lines above the "continue" button.
Have you tried navigating to panel.dreamhost.com and putting in the incorrect email address for "
Email Address or Web ID: " and the password you selected on the screen before the one captured above? Even if your account is in pending limbo, I think you should be able to at least login to the panel and find an active contact support link.
The dreamhost wiki is not an outside link, but I wouldn't have expected you to have found that info before I linked you to it, I merely supplied that link as means of further clarification.
As for the first link, I included it for a specific reason. To make sure you were contacting support the correct way. If you are emailing support at some address, it won't get there. Once you have an open ticket you can REPLY to emails from support, but you can not open a new ticket via email... to do that you must either use the contact form linked or use the panel.
Correction: Actually the "learn more" link in those two line above the continue button take you to the exact wiki page I linked.