You do not know if a seller has shipped the item or not. Sellers are NOT required to list a delivery confirmation number nor are they required to mark the item shipped.
You have 2 date that show on the listing that are ESTIMATES,..............If by the last date, the item has not arrived, then you wait another 7-10 days. Then you contact the seller. If you do not get anywhere with the seller, then go to the resolution center and open the appropriate case.
You are being way too impatient, and premature in wanting to just open a case.
REMEMBER: IT IS THE HOLIDAY SEASON AND SHIPPING CAN BE DELAYED.............................