Self — refund money

I have bout a air ticket from with order id[protected] and pnr number oj7u7a 6e-506 with rs15560 from happyeasygo and i cancel my ticket but the happyeasygo return me only rs560 though the indigo retuns rs4340. Need help. I have tried to communicate to happyeasygo but no answer of my complain several time. My details below-
Indigo passenger (S)
Passenger 1
Mr md ashikur rahman
Passenger 2
Ms mst fakhrun nessa
Passenger 3
Mr md rakibul islam
Passenger 4
Mr md sazedur rahaman
Price summary
Refund amount4, 340.00 inr
Cancel change fees11, 432.00 inr
Cgst for west bengal for change/cancel fees284.00 inr
Sgst for west bengal for change/cancel fees284.00 inr
Total deductions12, 000.00 inr