Oh my GOD, another thread about the trust system. This is really insane, I don't think Vod has abused the trust system but his negative trust is not necessary because legality and illegality is an abstract concept here in the forum. We do not know in which jurisdiction is based the seller and ours are only supposition.

However OP you should try to talk with Vod, only he can remove the negative trust and if he abused it then he will be removed from the trust system as few other users.

Good luck with your battle (that was only my personal opinion, and we are in a free forum with right & clear rules).