They called but didn't leave a message and caller ID was just Christina FL?

Called several days in a row when we were at work and did not leave a message.  (we see it on the caller id).  Called when I was home and asked for James.  I say "Nobody here by that name."  They say, "we have the name wrong but the right number."   WHAT?  How can the number be right if the name is wrong, I ask?  They go into a spiel about childhood cancer.  I cut them off and tell them not to call this number again.  And I blocked it.

They just called. 8:30 Friday night. Caller ID said Christmas, Florida. When answering machine picked up, they hung up. Never said a word. That makes a couple times now.