National Board Of Examination — Refund of fee

I have been allotted dnbseat in mopup round of neetpg 2021 for which I paid the first year course fee through net banking on 28/03/2022 but receipt for this payment was not generated and as last date of reporting approached I made another payment, receipt was generated I reported to the hospital but later mopup round was cancelled.I got allotted another DNB seat in fresh mopup round, kindly help me with the refund of the first payment made, it's been too long and there was no response to queries