Employer not paying my salary after I resigned. What are my legal options?

I resigned from my job at a private firm in Mumbai last month, and I served my notice period as required. However, my employer has not paid my salary for the last two months. Every time I contact them, they make excuses and delay payment. I'm really stressed as I need the money urgently. Can I take legal action against them to recover my due salary? What steps should I follow according to Indian employment law?