National Institute Of Open Schooling — duplicate transaction

Dear sir/madam,

I have made payment through net banking but status is showing payment is not made but the amount of 4510 was deducted from my account. I had waited but the status was payment not complete after that i again tried to make payment then payment was accepted.
Transactions details can find as attachments, below are the reference no and enrolment no of the transactions are
Frist transaction :-
Reference no d[protected]
Enrolment no [protected]

Second transaction :-
Reference no d[protected]
Enrolment no [protected]
My complaint is for refund of my douplicate payment transaction, i mean my frist transaction. I talk to bank customer care they advice me to call the merchant i. E nios as the payment was successfully done. So i would like to request, kindly refund my transaction, i show in nios complaint portal also lot of people is suffered the same problem, kindly do it need ful asap.
Name - deepak kumar singh
My ref. No.- d[protected]Enrolment no.- [protected])
D[protected]Enrolment no.- [protected])
Contact no [protected]