This number has called me 3 times, but has not left a message.

me too...same thing

The guy kept calling me for days and when one day I picked up his phone by mistake , the guy started selling me a radio service for a new car that I recently purchased. He kept speaking non stop and pretended as if I am accepting his offer ..  I am saying "NO" to his offer and he replies "OK, so you are excepting this offer...thank you, we will send details to your email address...you will be charged...blah blah blah"... !!  .. THIS IS SPAM CALL, DO NOT PICK.

Keeps calling on a regular basis and I do not answer.   Called again  today, Sunday.        Good grief can't a person. Take a nap on a Sunday afternoon!!!