Immediately issue a registered notice under CP Act, reminding date wise all assurances made right from acceptance of your deposit and all your efforts. You may inform in the notice that if they fail to refund the deposit, you will be constrained to approach to Consumer Forum for such rights. Invariably record the urgency of your funds.
Wait for a month and then file a complaint before District Consumer Forum as a party in person. Preserve the receipt given by them. The complaint before District forum may not cost more than Rs.200/-towards typing, postal and stationery charges.