Did you check your account settings? If I remember correctly there is a part where you are reminded of verifying and may be able to do it from there. It is in... one of the settings, because you have to verify in order to have access to all settings, I believe. You could also try re-logging. Maybe it will remind you of the verification?
Other than that: Did you check all email folders? When did you create your account? Maybe it will take a bit to receive the mail, or the system will sent it out to you after your account has been checked? You can also look into the FAQ in that regard (you can find it at the bottom of the page).
If you think that you've tried everything, you can also contact the support. You will find the link to that at the bottom as well (next to the FAQ link).