Feedback Question [Outdated]

I know what to do if someone leaves me a feedback that I don't think is justified (all my positives
), but what would be the procedure if I see someone else received a negative feedback that they shouldn't have?
I only ask because the person who received it obviously is not fluent in English, so they probably do not know the proper response to this. Just sad to see someone new with bad feedback when they shouldn't.

I only ask because the person who received it obviously is not fluent in English, so they probably do not know the proper response to this. Just sad to see someone new with bad feedback when they shouldn't.