You can contact trademe and ask them to remove your bid, or you can ask the seller through the questions and answers feature to remove your bid, if he ignore your request then definitely ask trademe to remove it.

Ive had my questions and answers feature revoked permanently which I think is unfair, trademe refuses to reinstate it and I cant ask questions neither can other traders they can't ask me questions whuch is unfair to them, I cant do anything about it abd ive tried.