To get your music in Spotify, you need to contact a label or distributor and they'll upload it for your for a price.
You might be able to find out more info here. If you don't remember which distributor you uploaded your music with, I'd recommend checking out your email address for emails from any distributors. Here's an article with the most popular ones.
Hope this helps and let me know if there's anything else I can help with!
Jose_MRock Star 11
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