My boyfriend tricked me into giving him 4 lakh rupees, claiming his father was ill. His brother even faked his father’s sickness to get the money. When I learned the truth, his father promised to pay me in 4 installments but the first cheque bounced. What should I do now?

This situation appears to involve both cheating (Section 420 of IPC) and breach of contract (dishonored cheque under Negotiable Instruments Act). You should file a police complaint for cheating and also initiate legal proceedings against the boyfriend, his brother, and his father for dishonoring the cheque. You should consult a lawyer for proper legal advice and assistance in pursuing these actions.