I think it’s bizarre that stuff like this is trivial for scammers but impossible for legit businesses.
My son’s catholic school has been around since 1950. A few students goofing off wrote some negative reviews, and somehow they are in a limbo where nobody can post reviews or modify the listing. I’m on the board and help with advertising... The funny thing is that it costs Google money — we can’t associate AdWords with the Maps listing. Just a few thousand bucks a year, but still money.