@Amber-Y-Andreu0 As others have said, their review goes 'Public' after 14 days if you do not review them. So review them and don't miss the deadline. Depending on time zone issues the "14 day deadline" may be a few hours sooner than you think it is. Get your review done soon, but do it thoughtfully.
Bad reviews are one of the trickiest aspects of hosting on airbnb. Learn from all these excellent commenters. Here are my suggestions from five years of hosting:
Keep your review polite and professional. Be conscise, factual and unemotional.
Do not mention any of the guests personal details or the guest can get the review removed.
Do not accuse the guest of a crime. example: if something is missing say it's missing, do not say guest XXXXX stole it. That may also get your review removed.
In addition to the other good suggestions start the review off with "I would not host XXXXX again". Hosts are busy and may only read the first line or two when looking at a potential guests previous reviews. Make it clear in the first line of your review that this is a bad guest, but say it a bit more artfully 🙂
Also be aware that some future guests like to read the reviews a prospective host has left for their other guests, before booking. I do when I travel airbnb. It can tell you more about a host (or a guest) than their profile.
https://www.airbnb.com/rooms/350391