Кто звонил с номера 9040000000

Received a call from 904-000-0000, called back the number and the message said that this mail box if full and can take any more messages.

We are getting harrassing phone calls from 904-000-0000. They never leave a message, if someone is on the line it sounds like a cell phone and they hang up on me. These come day and night, always to our cell phones.

We don't owe anyone money and try to guard our personal data.
Make them stop!!!!

January 13, 2011 :  two different cell phone #'s, subject was late mortgage pmt.

This number (904) 000-0000 has called me 16 times in the past hour and a half.  Also leaving 13 voice mails all of them saying press 9 to be removed from our call list.  I don't know what to do.

Who is this and how did they get my phone number? Is this something I should report to the police? I have an unlisted number.