Credit card telemarketer wanting credit card info

Strange... Then why are they picking on my grandfather and my grandmother? My grandfather told me they are the pain in the butt. If they do say something like they done to Kris or worse I would be so furious. I just wanna know who callin' and what does they want.

Spoofed (fake) caller id...no exchanges start with 0 or 1 in the U.S. so 000 is an invalid exchange.