Do you have access to your panel? If so, you should contact support through the panel. If no, you should definitely either contact support via the contact form:
or contact the abuse department directly at email@example.com.
Ask for a detailed explanation of your violation of the ToS.
BTW, when you say “more important websites” on your account, that’s worrisome because according to the ToS, you may not be able to get access to any of the data from any part of your account due to a ToS violation.
For everyone else who may be considering hosting here at Dreamhost (after all, these are the people this forum is supposed to be here to serve, not existing customers), you should always remember to take backups of everything on your account!
BTW, next time, if there is a next time, I would recommend posting on the “General Troubleshooting” forum. This one is meant for prospective customers to be able to post their questions.
Use the [color=#CC0000]3DOM50[/color] promo code for 3 extra lifetime domains and $50 off
More Dreamhost coupons here!