Dealing with unfair Google reviews is frustrating, but you aren't powerless....

https://alpha-wiki.win/index.php/How_to_Spot_a_Fake_Google_Reviewer_Profile:_A_Survival_Guide_for_Business_Owners

Dealing with unfair Google reviews is frustrating, but you aren't powerless. Some reviews can be removed if they clearly violate Google’s content policies. While results vary, your best shot at success is building a strong case