Do you mean how to deal with writing your review of the guest, or the guest's review of you, @Sandra628? If it is the former, I would just write a version of what you said here: "[Name] arrived, decided not to stay, and was provided a full refund."
I wouldn't say anything about it being unacceptable. That is their word. The house is acceptable to most of your guests - it is not an unacceptable place.
If cleanliness and communication were good, and house rules were followed, you could say that and also give them five stars. There is nothing to warn other hosts of here. It sounds like it simply was not a good fit. I would wait until they review you, or until the end of the 14 days to put up the review.
If you are worried about their review, I would say try to let it go. It's hard, but perhaps they will not review, and perhaps they will be kind. If the review is negative, it will get buried beneath your usual lovely reviews as time goes on.
They did stay, even though it was not for long, so they do have the right to review, as do you.