Please try to find the Talkatone account confirmation request in your inbox/spam file and follow the instructions from there.
In order to confirm/verify your email address with Talkatone you have to click on the hyperlink with the message "Activate Now".
Note for Non-US based users and Non-Gmail/Yahoo/iCloud email users :
When you click on the "Activate Now" button, you will be directed to Talkatone's Activation Page. Please make sure you have looked at the top of this activation page and checked the box next to “I am not a robot” to initiate the Captcha test, then fill it out to verify your account.