Caller refused to say what company he was with and just kept asking me questions about my identity. Then he said "is this the rude Mike".... he hung up when all I would say is "What company are you with?".

Same as other callers.  They don't answer when we pick up the phone.  Can't call them back.  They don't leave messages

They call daily but do not leave a message.  You cannot call the number back.

Same as above.  I told them to stop calling me.  Then I dialed back, and as expected, it did not even ring.  Will they ever learn the public is not as stupid as they are?