Got a call from them today stating the same thing you all have said. They used a new number of 817-381-1481. When I tried to get an answer out of them as to why they were calling and telling them that I didn't owe any money to any of them, they hung up. I called right back and there was no answer. Will block them.
I received the same call today but from a Samantha Jennings, same message was left but of course she didn't say to "whom" the message was for. I always ignore these messages because I know that law offices will send something in writing.