Air India — No Refund of Flight Cancelled by AI

HJGD2 is my PNR. The flight was from Jaipur to Bilaspur via Delhi. I boarded the Jaipur to Delhi Flight. And after landing at Delhi they tell that the flight has been delayed by 8 hours. After 2 hours they tell that the flight has been cancelled. Now I was left stranded at Delhi airport. Had they told me at Jaipur that the flight from Delhi to Bilaspur has been cancelled I wouldn't have boarded it. Its been more than 10 days and I haven't received my refund.

The flight cost was 14, 866 and I want the complete refund for the time lost and the mental agony I went through