Jawaharlal Nehru Technological University Hyderabad [Jntuh] — regarding od and transaction

Hi, my b. Tech passed out in 2013, hall ticket number is 09tt1a0447, today morning i tried to apply for od of jntuh through online. Unfortunately i mentioned wrong cmm and pc serial numbers and started payment through online and paid amount 1517.70 after amount debit from account the transaction page showing as below error and i attempted three times then it is showing same error and my amount is debited three times and transaction is not successful. So please tell me how to retrive my amount and how to correct the cmm and pc serial numbers in od.