MCS Ltd. [Sardar Sarovar Bonds] — maturity of the bond

I have sardar sarovar narmada nigam limited deep discountbond in physical format. And i like to send to mcs limited folio no sn218040, allotment no 218040. Number of bond one. Date of issue[protected]. I like to know what all documents i have to attached and whom i have to send it. Even i tried to call the msc limited (Sardar sarovar narmada nigam limited) division contact number.
My mail id is [protected]@gmail.com
Contact no [protected]