Roomster.com is a horrible service. You can post your profile and see others but you have to pay $30.00 just to communicate with anyone on the service. You're paying $30 a month to hope that others have been naive enough to the same thing and maybe make a connection. They have no 800 number. Just a link for you to email your concerns or questions. Its to protect themselves so that they really don't have to provide any service or guarantee.
This company is basically a legal scam. DON'T USE THIS SITE!