Bindal Agro Chem Ltd — physical holding of shares in maiden name now to get demat shares of oswal greentech ltd

I am holding 300 shares of bindal agro chem under two registered folios bi 553630 and bi 553631, 150 shares under each folio in my maiden name, matilda pinto. I have not heard anything from the company since 1997.
Upon browsing the internet now, i understand that the company has changed its name from bindal agro chem to oswal chemicals and is presently known as oswal greentech ltd. I have not been issued of any intimation so far. I would
Like to get the 300 shares of bindal agro converted to oswal greentech ltd and issued in my present name, matilda viegas so as to get them dematerialised and hold it under digital form. Kindly help me to get them digitalised.