Favourite Small Investment Limited — my grandparents did investment in this company

My grand parent did investment in this company (Favourite small investment limited) in the 1986, and i have three receipts of the investment.
Attached a photo for your easy reference. Kindly review that.
And i have more receipts like this.
Kindly advise how to get matured amount.

Looking for your soonest reply.

Thanks,
Abhijit