Citrus Payment Solutions — payment to hp gas through ez pay payment money deducted but not received by merchant

Hp Gas
Consumer No: 600040
Booking No: 501781
Order Date :[protected]:57:44
Order Ref No: [protected]
Cash Memo No: 133611
Cash Memo Date:[protected]

HP gas Booking No 501781 Consumer No: 600040 Delivered on 11-Septemeber-2018 by VIRUPAKSHA HP GAS.
As per the message received by HP Gas to make payment online
http://ezpay.hpcl.co.in//ezypay//h//[protected]

to pay the refill. I made the payment on Date: 9/9/2018 11:49:41 AM and Paymantra: Transaction No:[protected] the transaction was successful

I paid the amount Rs.820.50 via the above link and got the successful transaction message. But when the Gas delivery came the distributor denied for the online payment received confirmation. However, the amount is deducted from the bank. Please help me in refunding it. If this is the case I will never dare to do online payments.