At least the site is honest about data retention: you cannot delete your account. From their FAQ:
'Once a profile has been entered into the system it is there permanently. You can however, hide your profile if you wish.'
But wait, as one of our users pointed out, it seems to be possible to have your account deleted after all! Send a polite email to email@example.com with your request. Make sure to remove all your pictures from your profile before sending the mail.
If you signed up for XXXMatch using a third-party login such as Facebook or Twitter, you probably want to revoke all access from XXXMatch. Click the icon below to find out how.