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.
Complete scam. They made the mistake of calling an actual attorney. Every jurisdiction requires proper service. A message is not proper service and not returning their call does not equate to a waiver of counsel or failure to file an appearance. Call them back. Tell them your name is Toby and that you work in the kitchen. Call late at night or early in the morning.