Dealing with unfair Google reviews is frustrating, but you are not powerless....

https://www.primary-bookmarks.win/getting-a-bad-review-removed-isn-t-as-impossible-as-you-might-think-google-has-1

Dealing with unfair Google reviews is frustrating, but you are not powerless. Some reviews can be removed if they clearly violate Google policies like spam or harassment. Keep in mind that outcomes vary and success is never guaranteed