I have had the same experiences. I was told to write it up with the FCC and email them a complaint. Maybe if everyone does it, we can shut them down!
www.fcc.gov/cgb/complaints,html
Got a call from the 216-912-2002 number. The person spoke with a heavy indian accent. They immediately started asking questions about the business. When I asked who they were the response was that they were updating their list of businesses and wanted to know the address. It sounds like a marketing scheme of some kind. Be careful.