When I get these calls, I'll hit whatever number to get a live person, then I just tell them that I'm interested and give them a bogus name and credit card numbers. When they can't find them, they get mad and hang up...you waste my time, it's only fair that I return the favor.
Same as many of you, didn't answer because I didn't recognize the number and no message left. My, my, they have been busy in the last few hours, haven't they?