Consumer Redressal

I want to file a complaint against Emirates Airlines for the discomfort caused to me during my flight (Johannesburg-Dubai-Bangalore on 22nd /23rd Feb). The flight was late and I was not informed this in advance, even after knowing 12 hours in advance they were not prepared for the situation. I was forced to wait in Dubai airport for 19hours with only 2 meal vouchers. Hotel/Lounge access was also denied. I was also stuck in Johannesburg airport for 6hours. Staff in Dubai were rude and racially preferring other passengers. I had initially asked for a compensation of 1000 Euros from Emirates which they denied. I want to now file a case and demand 1.5 million INR for the discomfort, harassment, mental agony, physical torture, waste of time and money they caused me. I have back problem and has a disc prolapse surgery in 2007. I wanted to know the procedure to file a case for compensation. Kindly guide me.