Got a call and it was a recorded message. Tried calling back using google phone (gmail) and the idiot on the other end just hung up. Keep calling these b*****ds and annoy them.

Got a call from this number saying I was selected to win 5000 air miles. So annoying

I picked up and got a computerized voice saying I have been randomly selected to win some air miles or aero plan or something and to press 1, seemed scammy so I didn't

Automated Messages about winning 2500 air miles from rewards from air canada. When I didn't press 1 it just hung up. Doesn't sound professional. Normally a service would reprompt or something/ SCAM!

Got A Call with No message and told out of service when called back

Usage of CPE (Customer Provided Equipment) means that the caller-ID information has been set by the caller.  Thus, they can call you, while they are showing a "not-in-service" number.  So, because the number is "unassigned", no telephone-company (Bell, Telus, Shaw, et cetera) can route the number back to them.