How do I get rid of downloaded wallpapers on Samsung Core

[Bungg]

I've got wallpapers on this Samsung Core which I'm trying to delete. I have about 8 replicas of the same one and 2-3 others duplicated. I for the life of me (or someone else) cannot find a way to dump these critters. Help in doing this would be soooo much appreciated.
I would have chosen from the list this Samsung Core but it's not listed please.

 

[Bungg]

Fifty seven viewers on this article and not one dunce can give an answer. What is the point of this place even being here????????????????????