Airtel — Digital TV

I have done my Digital tv recharge on 06.07.2023. But the transaction was get into failed and discussed the customer care people to check this. They said it went failed so you will get the refund Rs1398 within 15 days also recommended to recharge again. Based on their confirmation i did another recharge on same day(06.07.2023)
But still i have not received the refund amount Rs1398. While i try to call customer care(198) people they were not given proper solution and answer. Still i have not received single call from the customer care team.

Its almost crossed one month. I don't know how to get my refund amount.

Can anyone please support to get my refund amount.