There is a way. It's called messaging a moderator and pleading your case.
He can't. Trust feedbacks are not moderated that is why most people do as what they will with it. If you appeal their response will be of that it is their own trust feedbacks and opinion and you can't change it because that is how their mind works.
Wrong. I have proof that the admin changes ratings. Do you want me to show you the web capture?
Please go ahead and show the proof, from my understanding, they will not change ratings, they would just delete it