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.
Received a call from this number at 11:10am on a Saturday morning. No-one responded when I answered, and in a few seconds an automated voice said "good-bye" and hung up.