We are removing the Teen category and making Yahoo! Chat available to users 18 or older in order to improve the user experience and compliance with our Terms of Service.
Where's the Contact Customer Care button? With so many improvements to Messenger since the version you're using (lots more features and reliability), we figured you're ready to move up. So get your upgrade and with the new version, rest assured if you have questions, you’ll find that friendly button on its help pages.