How can I stop these calls?

THESE people keep calling and the ID shows NORC U CHICAGO.    SCAMMMMMMEEEERRRS.    ENOUGHT ALREADY.   THEY WON'T LEAVE A MESSAGE.

I agree with the previous person. For weeks now this person calls and does not leave a message. I am really tired of this. Trying to get them to stop. If I get results I will post them.

For weeks now I  have get call from this number.  Just got one and it is a Sunday at  8:35 pm.   They don't give up!  oleave my family alone!

Another phone call from these people (NORC U CHICAGO).  Would not leave a message.     BIG SCAMMERS------I owe no one anything.    BIG BIG SCAMMERS ARE BEING REPORTED ONCE AGAIN.