HappyEasyGo — money deducted but ticket not booked

Website:

Happyeasygo.com

Tried to book a ticket through happyeasygo app from ahmedabad to delhi on 10 nov 2018 after transaction is completed the ticket was not booked. So called up customer care and they told that it will take 15 to 20 mins to book but after calling them after 30mins they told the ticket has been cancelled by go air due to fare difference. They have not given me any call for that. When i told them the transaction has been completed successful so pls refund me the amount same day but after they told me it will take around 10 to 15 days for refund. Why should i wait for that much time when the transaction is successfully completed. Very poor services and customer care executive don't know how to respond properly. Wanted immediate refund.