Sep 2, 2014
You asked a good question: "Why do they bother to call if there is no way to get connected to them?"
They do not want you to be able to reach them; they only want to collect enough financial and personal information from you so that they can steal from you.
If they provided a way for you to reach them, then so could law enforcement, if they cared enough to put forth the effort, and these criminals do not want to get caught.