CC Avenue — Refund of amount debited but transaction failed

Gentlemen,
I was booking appointment on 25/1/2021, for online consultation with Dr. Annu Agarwal (Kokilaben Hospital)for my mother Mrs Mariamma Thomas. I got the 3.30pm slot for 3rd feb, 2021 and made the payment of 1500/- from Axis bank account. Though the amt is debited, I did not get any confirmation for the same. I spoke to the hospital call centre helpline, who said the same is shown as pending and that I shud book again. In case double payment is received, the same will be refunded.
Accordingly, I booked again for 3.45pm slot( which was the only slot available now) for 3rd feb, 2021. I made the payment of 1500/- again and this time I got the confirmation too.
However, I have not received the refund of first amount.
Transaction id : INB/[protected]/CCAVENUES2/null
INB/[protected]/CCAVENYES2/null
Kindly look into the matter urgently.