Left a message from Law offices of Joel Cardis, LLC. "Please call about an important matter." Lady didn't say who the call was for. Could be anyone. This is a bottom feeding law firm that can't make it practicing any other law.
There is a good chance it is NOT even a law firm. "Lady didn't say who the call is for" - probably phishing for information. IF they call again, demand WRITTEN validation of any devt they claim you owe. Do not accept faxes, emails of phone calls - AND don't believe the "We mailed but it came back to us" excuse.