Sale and Deficiency: If Im the 3rd Party of a Vehicle That is Still Being Paid Off Could the Debtor

My question involves an auto loan or repossession in the State of:California. If Im the 3rd party of a vehicle that is still being paid off could the debtor come to my house,onto my property at 10pm demanding I take out all of my property because he's taking the vehicle back into his posession that still has all my property in it. Also,the debtor told me that ill get the vehicle back once the vehicle is paid off in full all at once. What can I do,what are my options????

Sale and Deficiency: If Im the 3rd Party of a Vehicle That is Still Being Paid Off Could the Debtor