Sent divorce notice but not ready to give stridhan

Hello, I got married in 2017, for 1.5 years everything was normal at my in laws house but suddenly after my father passed away, i got to know that my husband has gambled money. Due to his bad habit we moved to different city and lived seperately there for 1 year but again he did financial fraud in shop where he was working and currently he is in jail from past 10 months due to criminal case against him. I have sent divorce notice 1 month back, in that notice I didn't ask for any money from there side, i have just asked my stridhan which was given to me by my parents and my brother has transferred some 2 lac into my husbands account for financial help. But they don't want to give either the cash or my stridhan. They are ready to sign on mutual divorce. They are saying that my husband has sold all of my gold and silver things for gambling. So they can't give it back. Currently I am working. What shall I do in this situation.