Please click the "Sign In" link in the top right corner. You will see a popup that allows you to sign in with your existing email address and password.
If you do not already have an account, please look in the left column of the pop up under the social media methods to sign in, and instead, click the link next to New to WP Security Lock Support Center? Sign up
That will allow you to create an account in our support center and check the status of any existing tickets.