Call on caller ID called it back, got a bill for a call to Ottawahull, On

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.

Don't know who this is but tired of them calling and leaving no messages

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.

I won't answer if the Caller ID reads "Unavailable," and I don't recognize the area code.  No message left.

Just received a call this morning from this number. ?I do NOT answer any calls where the ID is "Blocked", "Unknown", "Unavailable", Anonymous" or "Out Of Area" or I don't recognize the caller ID.  The caller ID on this call was "OTTAWA   ON", no name and then the number.  Since we know people in Ottawa, I called the number back twice and both times I received the, "This Number Is Not In Service". "Please Check The Number and Dial Again"!  From what has been reported here, I see that it s a scam.