This is a scam, they want to get your credit card number so that they can scam you. They are Indians calling. You can call the anti fraud line at 1-888-495-8501 and report these individuals! There has to be a way to get these individuals stopped. I would also contact my MP or a Councillor to find out how this can be combatted through our judicial system.
Caller: 250-352-9679