I have been writing reviews on Amazon products since August of last year. Because I have been a reviewer for 24 years, I soon had sellers contacting me directly, as well as being active in many groups.
One item I had just didn’t work as it was supposed to. To cut a long story short, the seller emailed me, and asked me to delete the review, after numerous contacts with them, that came to nothing.
That is against Amazon TOS, so there was going to be no argument, I emailed them back, and said that I would report them to Amazon. That worked, as they never contacted me again.