what do u mean by chain analysis here
i dont know whom to contact in India and how should i approach or is there any website for Law enforcement pls explain in detail
Chainanalysis is an organisation that can help to track the scammers, but there is possibility that the scam is anonymous to the extent he may not be found. They might even educate you on how you can do little tracking yourself but I am not that sure about this.
Hacker probably use mixers which make this job very complex to solve.
Have you read this chainanalysis report:
DeFi Takes on Bigger Role in Money Laundering But Small Group of Centralized Services Still DominateDecentralized exchanges are more used for it, like all those ethereum based decentralized exchanges