All India Institute Of Medical Science [AIIMS] — Additionally paid registration fee not refunded

When I was registering for INICET exams at the AIIMS online forum, my first transaction wasn't recognised by the website and I had to pay the fees once again, and the second transaction was successful.
It would be really helpful if my first transaction is refunded back.
I had received a reply mail saying that the refunds will be made within 45 days from the last date of Final Registration. (i.e. 26.10.2020)
and it has been 45 days. I haven't gotten any refund yet and my other colleagues that I know who had paid twice also didn't get any refund.