How to recover money after death of the defendant

Two years ago my mother hired an advocate & filed 2 cases against the opposite party, I was helping her & was the witness in the case, I was also paying all the payments like court fees, Adv. fees etc.. In greed the adv. colluded with the opposite party & cheated me & my mother in the following ways: (1) He made fake court documents related to her cases which have fake Judge’s sign. & orders on it. (2) Hired a girl & made a fake police rape complaint against me & my mother which having fake SSP sign. & order on it. He threatened me & my mother of legal proceedings & jail and usurped Rs 4Lakhs from me in several parts in the name of fees of settling above mentioned scandals, I paid all the money through online directly to his bank account & have WhatsApp/ SMS chats of those scandals with their fees discussed, I also have call recordings too. When truth revealed I filed complaint against him, police filed FIR under sec. 420 & chargesheet is under court. In Feb. 2022 the advocate died in an accident, please help how can I recover my money now after his death, Is there any law/judgement exists to recover money after the death of the defendant? I want my money back. My Email: [deleted]