National Payments Corporation of India [NPCI] — Complaint regarding refund of debited amount

I have submitted examination fee of abdul kalam technical university lucknow but an amount of INR 7865 on 25 January 2021 has been debited from my account [protected] with transaction number[protected] . when I was mailed to aktu then they are saying that your amount did not receive in university. my request is to you to please see the matter of debited transaction .when I contacted to branch then there is no reply of branch manager regarding deduction.
kindly resolve my problem.