A. Was there any penalty clause for the breach of contract or agreement in said agreement?
B. Have you sent any mail or notice when the person breached the contract by failing to pay monthly amount of Rs. 15,000/-?
C. You would better issue a legal notice to make payment of arrears salary which is committed in the agreement and claim damages for mental agony, promissory estoppel and breach of contract's terms and conditions. And it is not easy to establish misconduct from your side that must be proved by producing material evidence.
D. You can approach the Labour Court for termination of contract service without giving proper notice and you can claim damages for breach of contract in Civil Court. For more information, contact local lawyer.