When amount you have paid exceeds the final price of the goods you’ve purchased or the amount you’ve paid was less than the required amount, please check your in-game balance at the top right of the payment page - the rest of the payment (or the full underpaid amount) is added to it.
How do I see this Game Balance and how can I use it?
You can redeem the balance partly or fully with your next payment. In order to do that - please choose the product and then click "Pay", you will see the price payable.
If you can’t see any balance on your account and you have received less game currency, please Contact us.