How to register my car at booking.com

I have two wrong objects in my account which I want to delete before creating a new one.

Where can i find contact email address or phone number for cooperation 'attractions'? like day tour, cruises, etc?? Can't find anything on the website.

Hello There, I am trying to register as a host/partner to host my Self sustainable house in aurovile. It is 8 bedrooms. But after I complete all the 100