Airtel — Refund not received for failed transaction

I have done 2 payments for fast tag recharge (each for 1000rs) on 18th Jan'24 via airtel payments bank.

One with UPI got successfull but one with hdfc bank debit card got failed and money is deducted from my account.

I have asked Hdfc bank and they are saying that merchant has claimed that money but airtel Payments bank is not refunding the money.

Requesting your help to get the refund of 1000rs for my failed transaction. I am attaching all the proof;s with this post.