Indigo Airlines — My plane ticket refund

I have book the ticket from indigo, ticket was confirm. when I was gone to mumbai international airport to checkin. they say we don't take passenger to kuwait transit. why they didnt tell while booking. I want to fly to frankfurt. this the all time problem with indigo they dont tell while booking and they waste your time on airport and dont cooperate at all. I want to complaint asl well appeal to refund my money ASAP, already im in deb. due to indigo.
Please kindly raise this complaint.

my flight pnr : OPNRJA - 6E;
Name: Shravan Deshmukh
mb no: +91 [protected], +49 [protected]