Consumer Redressal

I had booked Spice Jet ticket from BLR to DEL on Feb 27 for 21.05 Hrs for April 8th flight date; today Mar 19th SpiceJet has written to me stating that \"due to the introduction of our new summer schedule\" they are changing the flight time to 18.45 Hrs i.e., preponed by 2Hrs and 20 Minutes. I have planned my trip and booked my tickets accordingly, now if i have to cancel and buy tickets on another airline for departure after 21.00 hrs, the tickets are INR 6000 more costly. Questions: (1) What is my rederessal with SpiceJet? Is there a forum like DGCA or Consumer forum that can provide me relief? (2) Can i not get Spice to pay the INR 6000 over and above refunding my full money so i can go and book another ticket in another airline hat is departing after 21:00 hrs? thanks,