Elder Pharmaceuticals Ltd – Not refund of the principal amount of FD and bounced cheques of two terms

I am a senior citizen. I deposited Rs. 50,000 which was matured on 21 March 2015. But before that cheques for Sept and Dec 2014 were bounced. As fine money was cut away from savings account. The company did nor reply my mails. Lastly, the maturity amount was not paid. The receipt no. is N 71589.