EtiennesGF,
it can be fixed actually. if you put the fbx into blender and separate the meshes and import a different texture for the hair then import it back to unity then itll be fixed.

Very Broken, and textures have to be changed abit other wise she has this greasy look to her. Unable to change hoodie as files wont allow certain textures to open.

when changing hair colour it forces legs to change colour, this can not be fixed