When it Calls Answer and use a Soundboard that has ".....Were sorry the number you are trying to reach has been disconnected or is no longer in use" Message... repeat it twice. The calls stop. They called us 45 times in ONE HOUR today before I tried this trick and they immediately stopped... from both 312-548-9942 and 206-673-5892. It's clear it's an efax service, but it DOES recognize disconnected numbers apparently.
CID shows up as Seattle 206-673-5892 and has called the company I worked for multiple times a day, usually in the afternoon. When I answer, all you hear is fax machine noises. I'll just pick up and hang up from now on.