Sprites visible behind a wall, when it shouldn't be

Question

I have been trying to make a cube with a specific texture but for some reason even though the texture is working, I can see other sprites and textures through I can't understand why.

The 4d cube object

The texture material:

The texture used to make the material:

The sprite that needs to be invisible behind the wall:

The cube that is being used as the wall:

These are all the settings of the things that is being used in the scene.

This is how the ammo looks like while begin behind the wall object but I would wanna make it so it isn't visible but I can't figure out a way. If there is any other information you require, please tell me. It's my first time and just some difficulty I have been having for past day.