Make sure you are logged in.
Then, go to http://www.deezer.com/en/account
Click “Delete my account”. You have to enter your password and confirm.
Now check your mail and follow the link in the email. You have to once more enter your password to complete the process.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Deezer using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Deezer. Click here to find out how.