Vehicle reposession

I HAVE FINANCED FOR A VEHICLE AND THE CLIENT CHEQUES HAVE BEEN DISHORNOURED AND AS I WAS TO INITIATE LEGAL NOTICE I HAVE HEARD THAT THE CUSTOMER IS NO MORE. THE SAID VEHICLE IS WITH A VERY INFLUANCIAL PERSON, I HAVE THE ORIGINAL VEHICLE RECORDS, I APPROCHED THE PARTY WITH THE VEHICLE AND THEY AGREED TO SETTEL THE ACCOUNT BUT ITS ALMOST THREE MONTHS NOW AND AM NOT ABLE TO GET THE SETTELMENT FROM THEM. COULD I GET A SEC 9 NOTICE/ORDER TO GET THE VEHICLES AS IF I INITIATE A POLICE COMPLAINT THEY MIGHT HIDE THE VEHICLES AS THEY ARE VERY INFLUNCIAL, HOW DO I PROCEED, ANY SUGGESTIONS PLEASE.