If you wish to place an order, you need to be logged in.
If you do not have an account, you can create it here: https://id.kinguin.net/register
Afterward, find your desired product and simply head over to the checkout by clicking the cart button at the top of the page.
Once there, you can choose the payment method and apply a discount code.
Completing an order usually takes 15 minutes after the payment is successfully processed.