Hey there @revstavros!
The availability of music on Spotify is mainly up to the Record Label/Artist.
The song you mentioned is in 3 seperate parts, because the record label decided to have it up that way. Spotify can't do anything about that.
And I see you have trouble navigating the site, so heres how you can get to the topic I think you wanted to get to:
Step 1: When your on the homepage of the Spotify Community, click the music note icon labeled "Music Chat"
Step 2: Scroll down a bit, and you'll find a section titled "Playlist Exchange". Click the "View more" button, and find the topic your looking for.
In this section of the community, you can post your own playlists and exchange them with people.
Hope this helps, if you have any more questions, you can reply here or you can send me a Private Message.
Have a great day! 🙂