Jindal Vijayanagar Steel — First and final call notice.

I have certain physical share folio of jsw bought by my mother in law in 96
I have the certificates with me in which few money was paid and only last call money was not paid
I have been trying to get help as it is written behind the certificate that u can pay with interest I m ready to pay the interest of the missed call money because she never recd any call money notice.
Kindly help me what can I do and go forward
Also I called many times in Jindal office, Karvy but I never get any proper replies
My email is [protected]@yahoo.co.in
[protected]