Delhi University — Need refund for wrong payment

Website:

www.du.ac.in

I was submitting the migration fees upto 10 years but by mistake i click on the mode of instruction upto 10 years having transaction no. 20210212111212800110168093882415766
Amount - Rs. 500
Name - Mohit Singh
Order id - 447309
Email - [protected]@gmail.com
Date[protected]

I already do a complaint but there's no responding yet.
So i requested to you that solve my problem and refund my money as soon as possible.

Thanking you