Forum Moderators: Robert Charlton & goodroi
I had some sites closed down due to 302 page jacking and they posted negative commens about me but I posted rebuttals to them all and that is all I could do.
As you will see by reading the page above, Google will not remove a search result because we don't like it or don't agree with it. From what you describe, it sounds like you need to deal with the site that is hosting the negative comment, not Google.
I've worked with a lot of companies who wanted to see negative comments disappear. The best way to do that is to be such a good company that the web is filled with positive comments about you. Consumers are aware that there will always be some negative experiences with any company - but when the majority of what's out there is positive, then you're doing well.