I got a call no msg.

This is a fraud campaign currently active in Canada using a series of 604 area code 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.

This number calls once every 2-3 days, 'they' don't leave a message!
BEWARE!
SCAM!

Missed their call. Tried to call back, there is apparently no such person. Now I am glad ...

Scam. Don't pick up or call back.