You have the following options:
1) Issue a legal notice to the company stating that they are not forthcoming with new proposal despite passage e of considerable period. Hence demand the refund of money held by them with interest from the date of it beng lodged with them.
2) Approach consumer forum for deficiency of services and seek refund, cost for damages and mental agony along with interest for the amount held by them.
3) Lodge a criminal complaint with the jurisdictional police for cheating and breach of trust as well as for misappropriating the money.