Received a phone call from this number. No message left.

I got a call from this number stating that they have paper work attached to my social and that they will be sending it to my employer and my home address and that I have until 7 pm to call them back. Who are this people.......

I received a call from 512-308-6905 asking for a person that does not live here.  I said that they didn't live here and they said good luck in court.

Aprox 2 min later they called form "Private number" and said " you people are rediculous, pay your bill.

They called back 2 times right afterward and I didn't answer the phone.