I got this exact call -same person. Thanks for posting. Note that the calls do not ask for a specific person or state the name of the company. I'm deleting as well.
Left the same message and I called back and let him do his spiel. When he was done I said, "that's a very serious charge, but I have a better idea. How about I give you the finger and you F##K off. He hung up. I borrowed that from Keanu Reeves in The Matrix.