Guru Gobind Singh Indraprastha University — No response and refund from the university

I made my fee payment of ₹60, 000 for Round 1 Counselling but my transaction shows Invalid bank response even though my money got deducted from my account. My bank told me that there is no issue from their side but of the merchant i.e, IPU university. I paid through net banking. I paid 60, 000 again which made it a dual payment.
I contacted them multiple of times but their response is same i.e, you will be refunded in few days. But those few days has yet to come. I paid the university a total of ₹1.20 lakh which being a student is a big deal.