Lloyds Finance Limited — non - payment of fixed deposit made in[protected]

I had made a fixed deposit in the name of biswajit bhattacharjee and minoti chattoraj (My sister) in the year 1997 but till date neither any response nor payment made by the company. My details of the deposit receipt sent by the company on[protected] are as follow :
Deposit receipt no. : c/[protected]/1
Amount of deposit : rs. 6000 (Six thousand)
Period of deposit : 47 months
Rate of interest : 19.36%
Date of deposit : 31/051997
Maturity date : 30/04/2001
Matured value : rs.12000 (Twelve thousand)
Scheme name : money doubler