As the post above states, if you FE you go it alone and assume all the risk, SR cannot and will not be able to assist you in anyway whatsoever. DO NOT FE. The only thing you can do it try and work things out with the vendor, send them a copy of your transaction details relating to the order showing that you finalized etc. If they still do not want to play ball there is little you can do beyond drop your feedback and post a warning on the forums etc.