Greetings from Company Vakil !!
Our suggestion to you would be to send a Legal Notice to your collegue, thats the first and foremost thing for you to do.
If you don’t have his address, then you can even email it to him or send accross the same on whatsapp and send the same to his workplace as well.
If you need any help in drafting the requisite Legal Notice then you can always feel free to contact Company Vakil Notice Drafting Experts. We will surely help you recover your requisite amount.