Calls with different company names, threatens with court dates. numbers cannot be found in any reverse search

Just got calls myself from this number. I threatened to call the police and I called the company I owed money to and told them that this person is trying to collect money on their behalf. They are proceeding in their corporate dept. Hope this chick gets what is.coming to her

Got a VM message from Lorraine McKenzie stating that she is a civil claims processor attempting to serve notice. She provided a case number/reference number. Company's name is NAM LLC with phone number 302-415-3618. She stated she needed to hear from me today. After listening to the VM, I received a call from my mom and husband that she had left messages for me on their phone numbers. I called NAM LLC back but received VM. I informed Lorraine that she was not to contact my mother or my spouse or my place of employment; that she should only contact me. I also informed her that if the call was about a debt that I need a debt validation letter mailed to me via U.S. Postal Service. Lorraine called back and left another VM message for me stating that I had provided my relative's contact information. Well, if I had provided their contact info previously, I am now telling NAM LLC to stop contacting my relatives. At the end of the message she told me "Good luck to you, ma'am."
Has anybody else had similar experiences with NAM LLC?