Hello, just want to ask for advise.

Yung kapatid ko used my name sa car loan, ever since, sila yung gumamit ng car na approved under name ko. However, nag-away kami and i heard binenta nila yung car sa iba. Now, psbank is calling me to inform na di pa bayad yung car (one month delayed na). I asked for the number of the buyer pero di nila binibigay.

Really need a legal advise on this. I dont know what to do