@Helaine4
You appear to be a new host. Savvy guests prey on new hosts. Stand your ground, be honest in your review. It will warn other hosts, both new and experienced. This is your business to control, not Airbnbs.
I would not worry about a bad review, take a look at anything you can change/improve for future guests. If they review bad, don't answer. I recently had guests who threw an illegal substance party and slammed me and threatened me to post on social media. The review was 4/5. My review less, but my comment was neutral "Not a good fit". The guest got upset, pulled the review. Perfect in my books, my ratings went up. Remember, it's a business, leave the emotion out.
Hope you have commercial insurance coverage for the damages, do no rely on Airbnb.
Read through this board to learn as much as you can.