Indigo Airlines — Flight cancelled without prior information and without refund

Address:

Indigo Airlines, level 1, Tower C, Global business Park, Mehrauli, Gurgaon Road, Gurugram 122002

I have booked an Indigo flight for myself, my wife and my son via PNR no PT6GVE dated 23rd Dec 2021 from Chandigarh to Goa. The flight timings were 16.20 takeoff frim Chandigarh airport and 19.00 landing at Goa airport.
When we reached Chandigarh airport at 14.00hrs, i was told that my flight has already taken off at 12.30hrs.
On inquiring, we were told by the indigo staff that the airlines has cancelled my direct flight from Chandigarh to Goa and booked the same on a hopping flight via Mumbai without informing me about the same.
We were further charged 1800 per head by the airlines to make us board a flight to Delhi for onward journey to Goa at night.
All my prior bookings went waste as we reached Goa on 24th morning.
No compensation was extended by Indigo for their misdeed of spoiling my entire trip.