This number calls me over and over

This number has called me repeatedly in the last few weeks. I called it today & they answered "Global Solutions" or something similar. They claim to be a litigation firm & wanted me to confirm the last 4 digits of my SSN. I asked what the call was about & they stated it was an open litigation case, involving me. They provided 4 digits of a SSN. I refused to confirm if it was mine or not. Dude hung up on me. I called back & a chick answered, same greeting, failed to identify herself. Prompted me to confirm my last 4 SSN digits. Old girl hung up after I refused to comply. I'm callin the Attorney General's office once I'm off work.

Calls 3 to 4 times a day. Was asking for ssn#. that's not happening. Asked what's about, won't give any info till I give ss#.  Once they said they were Global Solutions.  Collections I suppose.  Don't owe anyone anything.  Asked them many times to stop calling.