Lady left me a message screaming that she was gonna file legal action in philadelphia county due to unpaid debt, has also called my father and father in laws house, refuses to validate debt

These jokers called my sister looking for me said they are calling from the litigation office to solve a matter with me concerning to counts of fraud. I told them they had the wrong person he asked for the last 4 numbers of my social I laughed than asked why he didnt have it or my telephone number for that matter. He started hollering"I don't need your social, I'm coming to get you my self I'll be there in 15 minutes. I told him to come on!