C U Marketing Company — not refunded the money

Address:

PRIYADARSHANI SEVA SANGH,MALAD E FLR,SAMITEE, RANI SATI MARG NR.,PATHANWADI,, Mumbai City, Maharashtra, 400097

Dear sir
I ravindra pal son of mr banarasi pal
My father had invested 40000 thousand in 1998 in c u marketing company and yet he got only 500 rs by some authorities of mumbai police and now he died in 9 0ct 2019.
However i am checking all document i found c u marketing certificate and 500 paid certificate so how can i claim
For the rest of my father amount.
Pls guide me.