HappyEasyGo — happy easy go refund of cancelled tickets

Address:

Vadodara, Gujarat, 390002

I booked my flight tickets using happy easy go mobile application for the date 22dec19 but unfortunately due to some circumstances in our family we planned to cancel the tickets on 23 november even we requested them to reschedule a flight. But they said they cant do anything.
Original tickets charges 12937
If i will reschedule my flight then i have to pay 22657

What is this nonsense.

Even they denied to refund me a single amount.

Please somebody help me to get atleast 50 of my amount.