Spice Jet Airlines — frequent change in flight timings

I booked a Flight from Delhi to Dehradun on October 30th which was frequently delayed and the timings were changed. Since I was boarding my first flight to Dehradun at Delhi travelled from Chennai and wasted my time at Airport for almost 4Hrs. I was not even given with proper reasons at the airport by the airline. My PNR is (PNR-OC5UST).Am very disappointed with the airlines.