Hello Minjeong Lee,

Sorry for the inconvenience you have experienced.
We have ran a few tests for payment methods listed on our website, and no error was found on our end.

Step1. Check the browser you are using
Please try placing the order again using Internet Explorer as your browser.
It works best on our website.

Step2. Check with your card issueing bank / company
Please contact your card issuing bank to check the status of your credit card,
below are possible conditions for failed payments:

1. If your credit card was issued outside the country you're currently using
2. If you have insufficient balance
3. If your credit card is not available for making online payments
4. If you have filed a false chargeback
5. If you have mismatching information with the credit card holder
* If there is still a problem, we would recommend you to use different card or payment method.

Once again we apologize for any inconvenience caused.
Please try placing an order again after checking the above details and e-mail us if the same problem continues to exist.

Thank you for shopping with Hello Yoon-Soo, have a nice day!
Regards,
Iryn

Hello Yoon-Soo