You should contact customer support through this link:
https://support.spotify.com/contact-spotify-support/
They'll help you with your refund. They take, at the most, 24 hrs to get back to you.
Don't forget to check your spam folder for responses as they may end up there.
If you get an automated email directing you to the community or help pages, you need to reply directly to support@spotify.com and one of the customer services agents will get back to you.
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