Hey @Astrid25! Welcome to the Spotify Community. ^^
The Spotify app is not available for Samsung Smart TV's.
But there is already an Idea for this. You can give this idea some Kudo's to show your support. ^^
Same problem here with my Samsung Ht-j4500. Called Samsung because they list spotify as a compatible app but there's no way to get it. Samsung said it's a developer issue and to contact spotify and let them know. Please fix this issue spotify.
Hey there you,
Yeah, you! 😁
Welcome - we're glad you joined the Spotify Community!
While you here, let's have a fun game…