I will try calling in too. After buying stuff from Amazon since 2000, I recently started getting blocked from submitting reviews. Today, they sent me the email officially saying my reviews had been suppressed and can't post reviews. It also had no details on what I did and that the decision was final.
The only thing that recently happened was I gave a poor rating to a really horrible electric toothbrush. The seller contacted me and offered a refund. I accepted. The seller then asked several times to update my review. I did not change my original review since the product was bad and a refund didn't change that. I wonder if they complained or reported me as receiving a free product. It deleted my review and keeps their product looking much better than it is.
I now trust Amazon reviews much less than I had.