Hey!

If you want to cancel your admission from University of Delhi(DU) , you just have to cancel your application from the college in which you had applied for admission in any course and not apply further in any cut off in any college or course. Although you won't get the refund immediately. The refunds will be made only when the University has completed its admission procedure and the data has been reconciled with the bank and the University of Delhi's Finance Branch. It is a bit lengthy process.

Hope it helps!