CALLS EVERYDAY... leaves no message. I called back requesting to be removed

I got a call from this number.  first there was a recorded message saying that President Obama wants us to re-negotiate our mortgage then had options to press.  I pressed one and a girl on the line asked me if I was interested--I told her I had no idea who she was and she hung up.  I'm worried that this is a scam and others might be pulled into it.

It's a scam.  Shows (613) 216-2172 "Ontario" on caller ID.  They are tryomng to get your credit card information.  File an online complaint with the FTC here:http://esupport.fcc.gov/complaints.htm

Received a call while driving and there was no one on the other end.  The Caller ID indicates that the origination is in Canada.  I do know that a lot of fraud is now coming out of Canada, targeting people here in the US.  The most often used is by mail and includes a large check that is drawn under a legitimate company name and a phone number in Canada to call to inquire how to get the money... which involves sending money to them for "taxes" on the "winnings"...

Though I have tried to "Call Block" this number through ATT, the service will not allow me to do so!

Receive calls from a toll free number and then when called back to check we are charged an international call fee.  We are on the DO NOT CALL list but apparently it doesn't matter to this company.  I usually do not answer unsolicited toll free numbers, but when we receive numerous calls from a particular number I sometimes check to see who they are .  Do not do this as we have been charged international fees on our phone bill.

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."