HappyEasyGo — Refund amount

I have purchased one air ticket through happy easy go, air asia airline the pnr no:a2dl8j flight no 15-582, on 14/07/2021 but the airline declare that the flight cancelled due to operation cause, the flight was from ccu (kolkata) to ixb (bagdogra), trip id[protected] but sorry to inform you that till date i have not received the cancellation amount.As the flight cancelled by the airline authority so i need full refund amount.