Welcome to Spotify Community and thanks for reaching out here!
Sorry to hear that you are experiencing that kind of issue.
I do recommend that you change your password.
Also, you can go to your account page and click SIGN OUT EVERYWHERE as well.
It's also strongly advised that you change the password for:
- The email address associated with your Spotify account (e.g. with Gmail, Hotmail, etc.)
- Any Facebook profile associated with your Spotify account. You can make sure you're the only one currently logged into your Facebook in your Facebook Settings, under Security and login > Where You’re Logged In.
- Any service where you use the same password as Spotify.
- Check out your account page to confirm if there is no app with access to your Spotify that you may not authorized.
And you can get more information about how to protect your account here.
Please, follow all these steps even if you've already made any one of them. After that, let me know if the issue persists.
If you have any other further questions or need more help, let me know! I'd love to help!
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Note: I'm not a Spotify employee.