I did not answer. I've been getting calls for the past few days from different numbers and they all came suddenly at once. Strange.

Yeah, I got the same thing. The past 3 or 4 days I have been getting calls from three different numbers over and over again, I got tired of it so I finally answered and every time I did they hung up. Just now, they called again, and I finally talked to someone and told then to please stop calling me. The guy wouldn;t answer me and insisted that they were not calling me and hanging up even though it was the SAME number!
WHY? All of a sudden?