Today I received approximately 18 fax calls from 778-724-1375, my fax answered and then nothing. After a few minutes it would again call. So I called 1-888-276-2339 extension #4. I talked to a live person, told them what was going on, they said it could be one of their customers and they would look it up and tell them to stop, but that could take up to 1/2 hour. I haven't received a call since then and it has been over an hour. So far so good. Thanks for the info, it seems to have helped at this point.