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.
Just got a call saying that I visited a website and if I confirm my number I could win $2600 dollars towards a trip.... I hung up at this point believing it to be a scam.