Hmm, looks like you've released this independently, without a record label. I'm sad to see a piece of the catalog being taken off (Spotify wants all the world's music, remember!), but if that's what you want, I'll tell you.
Spotify has no control over the submitted material: think of it like an unrestricted means for letting music be heard. Ask your friend to tell you the distribution service he used, and contact them to set things right! Again, Spotify can't do anything.
I'm sorry I can't assist you further! Hope this helps anyway 🙂