Each state's Attorney General's office usually has a department of consumer protection that will hear these complaints. I've reported Amazon to my AG more than once.
What sorts of outcomes have you seen from your reports?
I was contacted about one of my reports, and gave them more information about what happened. I haven't gotten a follow up to that call, but I didn't expect to.
You can also report them to /dev/null, it will have the same effect.
> You can also report them to /dev/null, it will have the same effect.
Seems to be the same effect as reporting them to jeff@amazon.com, then.