Ps: That red tag was given one year back, why coming to appeal now, it doesn't make sense especially after the password was just changed and posting began today.
Looks more like he bought the account from the rightful owner who maybe explained to him how the account got a negative trust, he then bought it cheap and now trying to have the negative trust removed since to him, he hadn't scammed anyone..
@op, don't know if your negative trust will ever be removed, but one thing I can tell you is that it's not until one scams another before that person is given a negative trust, if you indulge yourself/account in things considered suspicious and likely to lead to scam, you are immediately given a negative feed back, so know this and stay clear from things that will ruin your reputation here.