Bharat Sanchar Nigam [BSNL] — payment deducted but not refunded.

I had recharged my bsnl phone number via the website : inditab.com/recharge. The payment was done via net banking for an amount of rs. 37.50. The payment was successful but the recharge had failed. They had promised to get my money refunded within the next 48 hours. Even after expiry of the promised time, i didn't get the refund amount in my account.
Details of payment :
The recharge category was : bsnl special mobile.
The payment id: [protected].
The order id: indrc[protected]
Payment time : 01:05 pm, 20 jan 2020.
Please arrange to refund the payment amount at your earliest possible time.