Finalizing early on half an ounce of coke using a new buyer account probably wasn't the way to go but you have already come to that conclusion yourself no doubt. If you have submitted a customer support ticket via the market site an admin would have responded to you, although I suspect it would have basically been something along the lines of "if you FE we cannot help you I'm afraid". The protection you referred to is already built into the SR system in the form of escrow. It can be a bit more difficult to find a vendor who will offer you escrow over FE as a new buyer, I would however advise you to start smaller though as not many would be too keen on selling half oz to a newbie account with no stats. With regards to the comms you exchanged with the vendor, if they are what you say they are then you should request that an admin reviews them irrespective of whether they can assist to recover your coins or not because what you describe in that they allegedly did not ship should be brought to their attention. The admins can review all the messages you exchanged on SR so it would be easy for them to verify or discount your claims.