from the about page it shows Bitcoin Market LLC as being a State of Oklahoma corporation. The state filing is now inactive: https://www.sos.ok.gov/corp/corpInformation.aspx?id=3512287051
That is actually REALLY helpful! I'll send it a text, then try to call if I don't get a reply. Wish me luck.
EDIT: This topic is now closed. My account password has been restored, and the password reset emails all came through at once (about 15 of them). The bitcoins I thought should be there are not there, and my account is at a zero balance. Now I must locate the bitcoins in question.