This is a fraud campaign currently active in Canada using a series of Iristel VOIP numbers. The objective is to obtain your credit card number and drain your account.
If you attempt to "opt out" your number will be confirmed as live and added to a suckers list for repeated future calls.
Their machine responded to my machine with a canned message saying I had won a $2600 prize and free lodging, food, alcohol etc. in Cancun. Press 3 to opt out at any time. Press 1 to connect. TOTAL SCAM. Now on my blocked list.