Airtel — airtel myapp - bill payment transaction failed, but money not refunded

Address:

Kolkata, West Bengal, 700008

I tried to pay my bill (Of rs 357) on 07-oct-2018 for vodafone no [protected] from my airtel app which is also there in the same mobile. I tried twice but the transaction were unsuccessful. But, all of sudden i saw that my wallet balance reduced by rs 357. I was waiting for readjustment but it didn't happen. Plz refund back my amount immediately.
The app does not have transaction history with a understandable details. It's not upto mark. No help section in the app. Horrible.

I need my money back to my wallet.