eProHosted appears to be the hosting company that is hosting TMChost. You may want to contact them if TMC is MIA
you can contact eprohosted here:
http://www.eprohosted.com/billing/submitticket.php?step=2&deptid=1
or at support@eprohosted.com
both will open a support ticket with them. As a test, I just asked them a sales question and they answered me pretty quick!