コインを購入するため料金を支払いたいですが、韓国のカードを持っていません。どのように支払いすればいいですか？

Hello,

I would like to purchase coins on Dreamhack, but I do not have a Korean credit or debit card.
Could you please advise me on how I can make the payment?
Are there any alternative payment methods available for international users?

Thank you very much for your support.