Your listing is incorrectly set up, @Alet3. I suggest you "snooze" is as soon as possible while you make the appropriate changes. You must make a separate listing per room and also one listing for the whole house. Right now your listing allows the guest to rent as many rooms as they want for the single room charge.
To Snooze, go to your listing and select the Listing and change to Snooze.
You have Instant Booking which allows guests to book without contacting you. If you do not want to host the guests that have booked, contact Air BNB to have them cancelled and relocated. DO NOT cancel them yourself.
Here is a guide to contacting Air BNB which includes phone numbers.
https://community.withairbnb.com/t5/Help/Contact-Airbnb-A-Community-Help-Guide/m-p/16165#M728
Good luck and take a little more time to understand this platform and this business. The Help Center has great articles and this host forum also has great tutorials that can help. I think there is a tutorial about multiple listings in a single home. You will also need to sync the calendars of the individual listings.
Take care, Linda