Tamil Nadu Public Service Commission [TNPSC] — OTR payment Failure - Need a Refund

Hello Sir/Madam,

I made a payment to OTR registration last night. It failed but the amount was deducted from my bank account. I need a refund. I don't have my client number but I do have my email id which I used to register for the first time TNPSC OTR registration. I attached the screenshots from my net banking that's proof my money was deducted from my account.

Email ID : [protected]@gmail.com
Payment Date :[protected]:05:20
Order Id: OTR62503a189c0cc (I got this id from view previous payment list)
Payment Gateway: SBI - Other Netbanking - Icici Net Banking