Can we get any help from police or court?

Hi sir /Mam, This is rakshith from Bangalore, my father bought a car in April 2014 and loan was taken from Tata Capital we were paying the loan all through till Nov 2017. My father had shifted this loan to hero finance with some topup loan from Jan 2017. And was paying the EMI on-time without missing payments. We had no clue about this movement untill Dec 2017. He was diagnosed with cancer and he passed away in Nov 2017. Lately we learnt he had made loans against the car documents with loan financers for his treatment and they had car spare key and documents with them. As soon my dad passed away in Nov 2017, loan financers visited my place and they took car away from us. We are not able to trace them.. In btn we learnt car loan from tata was moved to hero finance company.. Now they are coming home and harrasing us in every possible way.. They use abusive language and giving a lot of torture threatening us. What are we supposed to do now, neither we have car to give to hero finance nor have funds to pay the hero finance company.. Am still student so do my siblings, we don't have any source of income.. What will be next course of action from bank and what should be our steps to overcome from this issue.. Please advise.. We are clueless and unable to bear this pain and shame.. Kindly help.