Are you reporting both maker and seller threw the box at you?
http://www.samsung.com/us/televisions-home-theater/home-theater/blu-ray-dvd-players/bd-j5700-za-blu-ray-player-bd-j5700-za/ seems to note an Opera apps store. Try that.
Hello, I just purchased a BD_j5700 Blueray player and it says it has access to over 250 apps. How do you access these apps?? Can you add more apps, for example, FoodNetwork, HGTV or Travel Channel apps?