NAL
Did you transfer the money online or give it to him in cash? If you transferred the money online, you have one more piece of evidence at hand.
Either way, you have 2 options –
Civil recovery suit – you will have to pay a higher court fee but the process can be much faster if you go for a summary suit
138 NIA (cheque bounce) – lower fees but this is a criminal offense and has an element of jail time. This usually works better in creating pressure to pay back but takes longer due to backlogs at courts.