Purchase at eFUN using a Rixty account:
Open website http://www.efunsa.com/ , click "Recharge", then enter your information in the game. (Tips: You can choose Portuguese on the top right corner.)
Select the game, the server your character in, and hen select your character, click "OK"
Choose Rixty as your payment method. Then you can select the payment amount.
Login to your Rixty account and complete the purchase. If you need to add funds, click a payment method and follow the prompts.