Getting help

I am new to booking.com and trying to set up listings for my 2 holiday lets and have the following questions.

1. How do you contact booking,com to get help?
2. How do you set up a minimum stay. When I click to set up minimum stay it opens a new window that is just blank?
3. How do I set up a maximum stay?
4. How do I limit bookings to 6 months in advance?
5. My studio apartment comes up as 1 bedroom house, how do I change that?
6. Import of photos listing info from airbnb does not work. It says my link isn't valid but it works fine.

So far I am very unimpressed with Booking.com, not sure I have the patience to persevere with it.