@Katerina459
At this point
1. I made an error I do not have a private jacuzzi. You just don't
2. You are welcome to enjoy the shared jacuzzi with a discount on rental cost,
3. Or you may cancel and leave promptly upon your exit today and the return of keys, \I will issue a 100% refund..
Do not say what you will do if he doesn't exit promptly, sounds like a threat or makes them think they can take 4 days to exit. Don't give him additional things to be mad about especially since you goofed. We all do it happens.
Say promptly instead of immediately same meaning but again nothing he can say to Airbnb.