i had pretty much a similar story, got banned for unknown reasons, not worth to mention that I did nothing wrong, at least not that I know off.
Did all the reading of any rules provided by google maps, but find a clue and filled out the form.
After a while my google maps profile got re-instated and got also my level 9 batch back.
Everything looks fine, except my reviews, I also put a lot of effort into that Programm and wrote around 1600 reviews. Im traveling since 2019 and already visited a lot of different countries and im pretty active in writing reviews.
My problem is a bit different and hopefully @InaS could bring some light into my problem.
On my googlemaps profile Im now a novice reviewer, after I wrote a review it has started counting from 0. Now im in around 6 or 7, but I can see also the count of all my reviews, thats around 1607+ ish.
For me it looks like, that all my reviews I wrote before the ban, are somehow there in counting as a number. But the batch (novice reviewer) has started from zero, it’s like the algorithm behind, is just ignoring my effort I did before the ban, thats around 1600 reviews:)))
Thank you very much for your help,
Carlos