Hey @정유정, Celine from the Figma Community Support team here. I don’t speak Korea so I hope it’s ok I continue in English here.
Thanks for the sharing these details about your billing issue. Since this involves account-specific billing and payment details, our Community Support team is not able to look into or discuss this directly here in the Community Forum.
I can see you've already reached out to our Support team about this (thanks for doing that!), I've gone ahead and escalated your case internally to increase visibility, since I understand you haven't heard back yet. For reference, your support case is 2118814, sent to your email address: yzzzg@gxxxl.xxm.
Regarding refunds: payments are generally non-refundable under Figma's Terms of Service, but our support team can take a closer look at your specific situation, including the seat change and payment information deletion request. Someone from our team will follow up with you directly through your existing case as soon as possible. Thanks for your patience!
Update: The support agent has resolved your request! Your plan has been canceled. Please check your inbox when you can! If you have any concerns, or questions, please reply directly to your support case, thank you!