1. The withholding of your legitimate dues is a criminal offence for which you can initiate legal action.
2. However before doing so send him a legal action mentioning your desire to explore legal recourse if he fails to relse your arrears salary and other benefits.
3. if he does not then lodge a complaint with Police alleging cheating as well criminal breach of trust. Once you do the police can register FIR and can arrest the person responsible for withholding your money.
4. There is civil procedure also but FIR is best suited to get back your money in not time.
best of luck.