Delhi Development Authority [DDA] — want to cancel my application from dda flats 2017

Hi.
I have submitted application of dda flats in aug 2017.

Now, because of some medical emergency i want to cancel my application (Form no. 2002348 and ref. No. [protected]) from dda flat allotments.

Please suggest what is the process? Is there any way that i can withdraw my application online by sending mail through my registered email id (Which i used while submitting the application) as i cant visit delhi in current situation.