Airtel — online mobile transaction failed money not refunded

Address:

600038

I recharged my airtel number [protected] with 400 through my airtel app unfortunately the transaction was failed but the recharge money 400 was deducted from my account after some time again 400 was deducted. Totaly 800 was deducted for failed transaction.10 days have been completed till the money was not refunded. This was totally unfair.
Refund my money as soon as u can