sandpoint capital

I TOO GOT A LOAN FROM THEM AND YESTERDAY I HAVE RECEIVED A C ALL FROM A GUY STATING THAT HE IS WITH A LAW FIRM AND I AM BEING SUED AND I WILL BE BE GOING TO JAIL FOR DEFAULTING ON A LOAN AND HOW I SHOULD FAX HIM A COPY OF MY DRIVER'S LICENSE AND WRITE A LETTER STATING I AM WILLING TO PAY SEVEN HUNDRED AND TWENTY ONE DOLLARS AND THIRTY EIGHT CENT.HE CALLED AND I ASKED FOR THE PERSON HE PUTS THE PHONE DOWN AND WHEN THE PERSON ANSWERED IT WAS THE SAME PERSON.HE IS THREATENING ME STATING THAT I WILL BE G ONE CALLED MY PHOING TO JAIL AND HOW CRIMINAL CHARGES ARE AGAINST ME.I CALLED THE NUMBER TODAY AND IT WAS DISCONNECTED SO SINCE EVENING HE CALLED MY PHONE WITH UNKNOWN NUMBER and he gave to me another number .what should i do about this.he has my identity