Make sure you are registered with an account by clicking here
If you already have an account click here to sign in

Sign in using your email address and password (Phone Number + PIN Code is no longer supported)
Once signed in you will see your account Dashboard

On the account Dashboard click on "Manage Payment Methods" under the Your Account section

Add Credit Card

Fill out all required fields then click the "Save Account" button
Add Bank Account

Fill out all required fields then click the "Save Account" button