Welcome to Spotify Community and thanks for contacting us here!
About your issue, I suggest that you be in touch with the Customer Support immediately because if you don't recognize the email exchange, probably someone has taken access for your account.
If you need more information or have any other issues, let me know!
Be sure to check this support article here.
As @hezorg mentioned, you should contact support.
Log out of the Spotify website in your browser and fill out this special contact form. Someone from Spotify will be happy to help you out.
Make sure you are logged out of any Spotify account in your browser when using the contact form or the username and custom email field will not show up. It is important so that you can enter the information of the account you are having trouble with. If you are logged in with a different account that is not having the problem, that account info will be used and support will be confused.
You should get a reply within 24-48 hours.
If you get an automated email directing you to the community or help pages, you need to reply directly to that email (even if its from no-reply) and one of the customer services agents will get back to you.