I haven't read everything, but if this is true, I'd say the negative feedback should be removed. This might also help motivate others to do the right thing in a similar situation in the future.
If it becomes clear negative feedback is there to stay even after fixing the accusations, users might be less willing to do the right thing.
This is more like a personal issue than a negative feedback in necessity. At least that's what I have seen, no, I am not trying to vouch BestChange because I am promoting them. NOTE- I might be wrong, please point out that if I am.
BestChange suggested ChangeHero or something which one user used and get scammed (Solved now). There is a flag created on BestChange profile supported by some respected members. But no flag for ChangeHero who actually scammed. This is like- Tag Yobit promotors but not Yahoo. Sorry but that seems the issue.
There are some negative tag written like
"Recommending scam exchange or fake exchange." but again no negative tag on ChangeHero profile yet.
What this can be other than a personal issue? Why no tag on ChangeHero? Did I miss anything?