Please BAN the User and delete the seller posts
that is unlikely to happen, scams are not moderated in this forum. so anyone who is a scammer won't be banned but if they are reported and has credible evidence they will most likely get a negative tag to alert new users to avoid transacting with the user. I feel bad about what happened to you but it is your responsibility to make a background check to make sure the one you are transacting with is trustworthy or make necessary precaution(i.e. escrow) to make sure that the trade will be safe.