I don't think that the review was censored, but more like deemed illegitimate by the sellers response. Before buying a model make sure that the model fits your requirements by viewing the description, model formats and the preview images. His point about a single negative review being more harmful than the sale would profit him is a very valid point to why negative reviews are taken seriously by the moderators.
However, you can probably get your purchase refunded. I've had some of my stuff refunded before, just press the help button on the right side of screen or find one of the emails for support and ask for a refund on that model, because it wasn't what you thought you were getting/ it doesn't suit your needs. The seller probably didn't know about refunds, because sellers don't have access to the tools to refund.
Hope I was helpful, Locki.