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In this case, there are a couple things that could have happened, we’ll help you get to the bottom of it.
Are you seeing your playlists when you sign in? Try to log out/ log in and see if your Premium activates.
If a log out/ log in doesn’t work check your inbox. Did you get a confirmation email after upgrading?
If you have your subscription confirmation and it’s still not appearing you may have created a second account and upgrade that one on accident. Please follow this guide in our FAQ to find out if you have a second account.