I will never again post a review on Google Maps. One review was flagged as ‘defamation’. They couldn’t tell me what was defamatory. They asked for example for documents proving that I was there (which was 2-3 years ago, a café where I paid cash).
I wrote to the owner of the café, who apologized saying that my review was accidentally flagged and they wanted to flag another. And that they would take care.
I sent Google a screenshot of that mail. They asked for a court order or getting a lawyer.