Alchemist Infra Realty — maturity amount not received till now

Address:

712503

Dear sir,
We have deposited 300000/- rupees in alchemist infra realty limited on 05/03/2013, airl no. Rx00039535 which is matured on 05/03/2016, we have submitted papers to local office, but still we are waiting for our money, i badly need this money for treatment of my child.
Even the cheques of interests are pending.
Company is not doing payment on these cheques.
Please help what to do.
We are helpless and hopeless.
Please help...