You should be able to login using either your email address, or the WebID that was assigned to you upon creating your account. Not sure how you contacted our support team, but if you can send me the email address you used to contact us, I can look into the support history and maybe find out what’s going on.
Also, have you checked the Spam folder of your inbox? Sometimes DreamHost-related messages happen to end up there. Happens to me all the time.