How to recover loan?

sir/madam

following are my queries,

mr.x gave loan to mr.y through ecs transfer.no documents took while giving loan but a mail confirmation and adhar proof was taken from "y".the duedate was completed 4months back.now mr.y is not at all responding to any message/mail/whatsapp/call.how to recover amount from mr.y and what legal action can be taken on mr.y by mr.x.Is there any risk to mr.x?

thanks in advance.pls its urgent?