Calls two or three times a day, does not leave a message, very disturbing!

I have gotten several calls from this number in the last few days. They never leave a message. This is very frustrating. If you call it back they answer with the name "Medcare" or Medcalf" a little hard to understand but they give you an option to be added to their "Do Not Call" list.

called them back, got automated Medcare, then no one answered, just background conversations like in a breakroom.  internet search for medcare not helpful.

Just got a call from 717-549-4255 .  When I answered,  I heard some background noise,  then a phone clattering hangup.  I did not recall.  I did a reverse phone look-up. Gettysburg,  Pa. Unlisted. Only one call so far. Could have been a miss-dial.  I know that when I miss-dial, I apologize. I feel hanging up is a breech in etiquette.
Putting soap box away.

Just a call from this number. No message. Adding it to my reject list.