Airtel — airtel recharged twice by mistake for same pack

I recharged[protected] for plan 998 on jan 24 and i did not receive any success teansaction message so recharged again for plan 998 on jan 26 also. As i haven't received the refund amount for failed transaction, i checked the transaction history once again where it is success actually. So please refund the plan 998 pack. I recharged both times by using my airtel app only.