GoAir — Regarding refund of fare in full due to lockdown

I have a booking with goair on 29th march. Travel route from delhi to varanasi. Due to lockdown the flight got cancelled. As per the latest guidelines my honourable court and dgca the airline must refund the full amount to the person but goair is not providing the refund instead they are forcing to take a credit shell. I have no further travelling plans this year following mid of next year. Please help me in getting the refund from goair