Debt colleting calling me . Sorry I don't have any money

Started getting these calls couple of weeks ago. Some law firm in Jacksonville, Fla. Bill collectors trying to collect accounts they bought for pennies on the dollar.

Sent debt validation letter and will play out the game.

got a call from this number said he mike woods with sheer law firm said he recived letter stating I would take care of some type of legal matter for my mother, he won't tell me what the matter is and my mother has no clue abuot ant legal matter

Just got a call a minute ago asking for Celia somebody. He said he was from a law office. I told him that
the number was incorrect and he said goodbye. I know 904 is Jacksonville Florida.

The first time a man called from this number asking for someone I don't know.  He asked repeatedly if this was the ... residence.  I told him "no", this is my residence, and I'm not ...  I thought that would be the end of it, but there have been two more calls from this number listed on my caller id in the past week.  I'm on the "do not call" list, so I don't understand why this person continues to call my number.  He doesn't leave a message and he doesn't identify himself.

Called the house several times. Cant understand the recording.  Cant get ahold of them.