Fake bad reviews on Google MyBusiness

Hy all !

I want to know how do you handle fake bad reviews on Google MyBusiness. How do i know are fake : name/happenings described in the reviews, are not in our books. One even mistake our business with other.
I have flagged the 3 reviews (all 1 star), but nothing yet from Google.
I know, we need to give good services for clients, we need to get more positive reviews, but, i neeed to clear the fake ones.
Any ideas? WordPress ...