You can issue a legal notice to your friend, saying you will be taking criminal action if he doesn't pay you back within 7 days of receipt of notice. That usually helps in bring about a movement.
For further queries, you can contact me.
Sir, I'll provide you certain legal suggestions, but for that i need to ask certain questions from you. For any further assistance, feel free to contact me on my e-mail "firstname.lastname@example.org"
Shubham Pabbi & Associates
You can send legal notice through your advocate and can claim refund of amount to your friends
For advise you to Mail me on