What should I do if a payment fails?
Common causes are insufficient balance or limit, an expired card, overseas payments blocked, a wrong billing address or CVV, and the card issuer's fraud prevention. Ask your card issuer whether overseas payments are allowed, then check balance, expiry and billing details. If it still fails, try another payment method or email cubeberry@cuberry.kr. For a payment page that will not open, or for declined authorisations, support will check with the payment provider (Stripe, PortOne and others).