Multiple account of same property

I am new to booking.com and I accidently created 2 profiles. How can I delete 1 of them. Also, this site is not user friendly because I closed my account thats open for booking on yesterday and then hit saved. When i checked it today some1 booked for February. They booked it this morning so i sent them a message explaining my property is not ready for booking because i havnt finished setting up everything. Can some1 PLEASE HELP me with this site.