all they want is an active credit card #   scam???????????

They have called me once today, and when I called the number back it says "the number you dialed has been cancelled".
I also have got a phone call from 1-780-800-4947, and when I call that number back it rings a few times, and starts beeping like its disconnected.
What are these numbers and why are they calling me?

This number has called me 3 times today and when I call it back it rings and then disconnects...

Repeated calls - just hang up when I answer