This phone number has called me repeatedly at my work number and never left a message. I saw in one of the other reports that this is a Sam's Club collection number. I have a Sam's Club card, but am not in line for any overdue bills, so I dont know what this is about. When I have picked up the call I got a recording that says this is a very important message, then nothing. Very annoying!! How can I stop these unwanted calls?