Go Air — Flight pre ponned need full amount return

I have booked flight for 5 december 2020, flight schedule timing is 5:00 pm and now flight pre ponned to 10;15 am which is almost 7 hours before schedule time and i am unable to catch the flight i have booked flight for specific reason for that time and now i required full refund amount of rs 3500 after cancellation but they are cutting chages of rs, 3000 please ask airline to refund full amount as there is default fro their side
PRN No - W66BUF