Need help with uv map and applying textures

Hello, I’ve just started to learn blender at the basic level. I have a dae file and 3 png textures

When I imported dae file to blender, it looked ok in rendered mode

but after i tried to unwrap uv, the texture didn’t get applied correctly at all

please help me

I’m guessing the objects were already UV unwrapped. You unwrapped them again, differently. Stuff no longer aligns properly on the image textures. Reimport the objects and don’t UV unwrap them.