Chandrash Lights and Power Private Limited - Invoice Amount unpaid from 1 5 years

We sent several products to Chandrash Lights and Power Private Limited over a span of last *.* years. We have been sending invoices and continuous reminder to the clients director with whom I was in contact Mr. Prem Prakash. Including the interest pending for the past *.* years and the part payments the total amounts to Rs. *,**,***. I want the client to give me my entire payment on/ before **/**/****. This notice is the final payment request I am making. Otherwise I will be compelled to file a legal notice and the matter ahead.