So here's the deal directly from westjet's customer service team (I got pissed off and called them to complain):  This is a SCAM, this message is not from WestJet it is in fact a private individual who is using an auto-dialer and a phone book, if you press 1 to indicate you want the prize they will ask you to pay the taxes on the prize with a credit card number.  They will then use your credit card for what ever they choose to...

I got this call, didn't answer it this time, but this number called me before. The last time it said it was Air Canada, and I was a preferred customer. Now it seems they are pretending to be Westjet. I am not a customer of either airline. And, I am a Telus customer, with an unlisted number.

Not Bell thing - I am with Rogers and just got a call on my cell.  Didn't answer so don't know who it was.
21 Oct 8:53EST

Called me at 12:10PM Oct. 20th. Was not able to pick the phone up.The number not being in service when I called back.I'm using Fido.

These guys just called me.  I'm on the Fido network, but I hung up without even listening to the message.  Glad I did.

I am with virgin so it cant be just with bell customers, cause i just got a phone call, didn't answer it as i didn't recognize  the long distance number, and looked it up. not the first time its happened to me and won't be the last either, most likely