Fake reviews on Google :(

Calling small biz owners:

How do you guys deal with this? My cleaning company was starting to climb the seo ranks for residential house cleaning, then we got spammed with three 1 star reviews that absolutely fricking tanked us.
I got everyone I know to report the reviews because they were obviously fake - they all came in within 5 minutes and were from anon accounts.

Anyone got any tips on how to deal with this?