For this particular case, I would encourage you to reach out to support through the anonymous contact form. So long as you are entirely logged out of Spotify.com (alternatively, you can access the form through an incognito window/private browsing) the form will allow you to use an email of your choosing for correspondence.
If you would prefer to not use the contact form, or require an alternative means of contact, you can always reach out to @SpotifyCares on twitter, or the Spotify Cares Facebook page. I hope this helps!
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