The info provided above by "Annoyed" will get you through to customer service. I just spoke to a live person that claimed they did a system block that was being harrassed. We'll see if it worked in a few days.
866-643-1023
and told to seek "Fax to mail team."
I had to jump through a series of selecting options for customer care before I got to "Fax to mail team." Finally got a live person who said he would block my number. He explained that one of their clients must have input a phone number wrong and got mine by mistake. Their "clients" are hospitals and financial institutions, he said.
They called me on Sept. 26 2010 'to send a fax on behalf of their client, who had been provided with my fax number' AT 5:00 AM!!! here in Montreal, Canada. Please tell me how to stop these guys!!