This same company is calling me over and over again from different numbers saying a lawsuit will be filed against me if I dont comply

I just got a call at my work from this # , They new my first and last name.

Stating I was getting sued and arrested

Threaten me with law suit called my job several times i call co they said they represent  and they knew NOTHING. these people knew my FULL NAME and  Address

call from. 4154846151 man. woth indian accent. first said. calling. frpm law. office. when. I. said from. where. he.legal California. investigation. knew. my full name told him I was sister he. left. this. number. to call. back but just. rings and. goes. to generic. voice he told. me. his name. was. steve.         ok habibe