In my first job, I signed a service bond for 3 years or pay 1.5 Lakhs (in Nov 2016). I resigned from the position and asked for relaxation in the amount, but they were adamant about the money. From the day I resigned, I served a notice period of about 80 days and then I left (in May 2018). Now I want the Form 16 and experience letter from the organization. However, even after several emails, they are not replying. Can I follow any legal procedure? Is it wrong to ask for those documents?