You holding the cards, keep them under your thumb. If they keep the papers, file an FIR that the papers are lost or if you are vindictive against them for wrongful possession.
You hold the cards in the situation, play the character of a bitch and don’t give in. It seems they are just looking to take advantage of you.
If you think they are after your life place cctv in your house and step out only with your friends. You might have anxiety but in this situation it’s normal to be that way. Just kick ass!