Need advice

I was in a relationship with a man whom I knew since 2019 , and who in 2021 invested my 30 lacs in few shares through a Zerodha Trading a/c much against my wish ,with the assurance that any losses will be covered by him - as he did not have that much fund available with him immediately to invest on his own . He had alternatively volunteered to give a blank cheque of that equalavalent amount in my name , in case if I transfer that or more fund to his name & the investment is made by him directly . 6 months after the investment , the money started going down so much so that now 30 lacs have become 7 lacs . The man in question turned out to be a liar & cheat and left the city in 2022. He has no intention of returning my money though I have offered to transfer those shares in his name as was agreed then and keeps on saying that it will improve soon. On being charged that the money was invested solely trusting in good faith his assurance of taking complete responsibility , he mentions that his own investments are at much more loss now and he did not forsee this happening . He has not only caused emotional torture , but severe financial loss for a middle class single woman like me . He does not respond to calls and any attempt from my end to get back the money had failed. Please advise if any appropriate legal action is available to recover my money and suitable punishment of the concermed person for causing immense mental trauma since past several months