My company has stopped paying salaries & is not replying to my mails

I used to work in a Pvt Ltd. company. The company is head quartered in Chennai and I used to work in Mumbai branch office. I had joined the company in May 2012. However, from December 2012, the owner of the company stopped paying our salaries citing that the company is going through financial crisis and they are looking for investor to pump in fresh investment. However, in February 2013, the owner of the company terminated all the employees citing that they have failed to find any investor and are closing the business. Through email and con-call they owner had promised that they will pay our pending dues, severance pay and provide us Form 16 for the TDS deducted. Since then, i have followed up with the promoters/ owners of the company numerous times. Initially they were responding to our emails and have kept on promising that they will release the payment soon. However, off late they have stopped responding to my emails. Kindly suggest how should i go about it