State Bank Of India [SBI] — Paid for Jee Advance through sbi mops twice but amount not reflected

I paid for Jee Advanced exam through sbi mops. The amount was debited from my bank account, but the sbi payment gateway page showed an error, and the payment was not reflected with the advanced registration account. This happened not once but twice, the details of the payments are as follows,
1) payment with internet banking option(Rs. 2817) -
2) payment with debit card(Rs. 2800).
Please refund me my money