File a complaint with the FCC Online here:  http://esupport.fcc.gov/complaints.htm  These people should be shut down because they use automated machines and do not allow you to tell them to stop.  Their mailbox is "full."

Caller ID says Unknown Name, I called back and it says message box full.  No idea who it is.

Got a call from them about 12:30PM today. Did not pick up and they left no voice mail. I went to the FCC site and filed a complaint: http://esupport.fcc.gov/complaints.htm

Received several calls from Ontario, CA (613) 216-2172 with no message.  Called back and no company name was given, so I hung up.  Now I'm charged for two international calls to Ontario, Canada, which totaled over $6 with all the taxes and carrier cost recovery fee.

It's a scam.

Received this call 2 days in a row.  Yesterday i pressed one to talk to somebody, told them I'm on the Do Not Call list and they promptly hung-up.

Today, i pressed one again, when I inquired as to their company name they promptly hung up again.

Very dishonest to say the least.  Not sure what action I can take with no information.