Triumph Infotech — Refundable deposit not refunded

Address: 204, VTM2, Mehra Compound, Sakinaka, Andheri E, Near Axis Bank ATM, Nr. Vespa Showroom, Mumbai Maharashtra India

They have inform me to join for typing work, taken total 15000/- out of this 3000/- processiong fees & 12000/- refundable deposit, but they are not refunging my deposit.