So to make a long story short, this is what happened.
-Guests book my place for 2 nights.
-Guests's never show up, because of bad weather cancelling their boat.
-Guests ask for a full refund 1 day after check-in
-I decline, telling them to talk to Airbnb, and if Airbnb's rule make it an extenuating circumstance, they will refund him for me.
-Guests leaves semi-negative review, with a bad score.
-I talk to Airbnb about removing the review, they decline.
How is it possible that a review left because I declined to refund them, after the guest never even seeing the house is accepted? How was he allowed to review the place, the cleanliness, the accuracy and the value if he never showed up?
This is absurd from Airbnb's side