Alchemist Infra Realty — I am complaining about maturity

I am Shipra Mondal. My allotment no. AIRL/ RDD0468879. My estimated value was Rs.30000/- dated 05.03.2012 and maturity date is over on dtd.05.03.2018 and maturity value is not less than Rs.60000/- . I ma already issued my original certificate copy in our local H.O. at Kolkata. But not credited the amount in my Bank account.