GoAir — Refund of cancelled ticket and fraud

No refund against cancellation of flight G8-373.
PNR - R8EF3J

The airlines cancelled the flight without any notification to customer. Got to know about cancellation only while checking in online one day before departure.
I had to attend a very important business meeting. There are no other direct flights for 5 days for my itinerary.
The customer care is not at all responsive. Doesn't take calls or respond to any mails.

What am I supposed to do? This is pure violation of customer care policy. I need my money back. Please help!