Unless you want to cancel the bookings you have and suffer the host penalties, you have to live with situation the guest booked with, @Alex1270. You are not alone with still needing to tweak your listing and getting bookings. You need to disable Instant Booking until you are more comfortable with this platform and the hosting business. Or, you can just snooze your listing until you feel it is properly set up. If you do not know how to do these actions, go to the Help Center to get instructions for editing. Good luck and welcome to Air BNB.