Cheque Dishonor after signing sale agreement

Rs 500,000/- was given to me as advance after signing a sale agreement buy the buyer. They had agreed to do the registration after I'd cleared the pending loan on the house from the bank. I deposited the cheque in bank for clearance. As they wanted to do the registration at earliest, I closed the loan account from my savings, without waiting for realisation of their cheque of RS. 500,000/-. Accordingly, I got all property deeds from the bank. After I took all this action the buyer had stepped back from the agreement and ordered stop payment on the cheque, which was confirmed by the bank to me today. I'm unemployed and was banking on the proceeds from the sale of my property, however I ended up spending my savings on a deal which the buyer backed out after signing the agreement. I'd included a clause of legal action to be taken in case of breach of contract. What should I do now? What options are available with me?