Kuber Mutual Benefits Limited — Need Refund of Fixed Deposits

My mother invested in Kuber in 1998 and made 3 fixed deposits as follows
1. 17000 dated 24/10/1998
2. 17000 dated 24/10/1998
3. 16000 dated 24/10/1998

Now she is old, we lost our father and we need this money back
Kindly help us
My Contact details,
+91 [protected]
[protected]@gmail.com