Deleted order?

Around 3 weeks ago I placed an order with Mr.Saturn, a very reputable vendor, and I logged on today to check the status, as I have not recieved the package yet, and i noticed that it doesn't even show up under my orders page! The order has around a $700 value, and im just really confused on how my order just doesnt even show up under my order page. Where should I go from here?

UPDATE: The situation has been taken care of. UPDATE: R.I.P. Agora :'(