Delhi University — want to cancel my registration

Address:

Jhajjar, Haryana, 124103

I want to know that can du online portal refunded my money if i cancel my application b and how can i cancel my application form because i forget to upload self attested document.
My brother upload my normal document withough self attested by me so to reduce my chance of rejection i want to cancel my registration and apply with new one with self attested document.