1. If the company has in writing promised to repay the amount by March 2015 then it will be prudent on your part to wait. The underlying expression in the preceding statement is 'in writing'' which includes a promise made through an email. If, however, the company has orally promised to do so by March 2015 then there is no point in waiting.
2. You have many legal remedies available to you. To begin with, you can file a case for recovery of money against the company. This will include principal amount along with interest accrued thereon. This apart, you can file a petition for winding up before the High Court.
3. In addition to above, you can also file a criminal case for cheating and breach of trust against the company, which will cause a tremor in the company.