I reported a specific instance of this to Amazon before and they declined to take any action to police it. In the case I reported, it was a more subtle change. I had purchased some replacement brush heads for a Philips Sonicare toothbrush in the past which worked well for me. When I went to re-order them, I was shipped a completely different design and brand of brush head which was terrible and immediately started to deteriorate due to poor quality materials. Of course, all the thousands of positive reviews for this product referred to something that was no longer being sold through that listing.

I found it hard to believe that Amazon would allow this to stand, but here we are.