Hello @김민영 — welcome to Figma Forum. I don’t speak Korean, so I hope it’s okay that I’m replying in English.
Glad to help with this. You can stop future payments by canceling the plan. On a Professional plan, a team admin or owner can go to Admin → Settings and choose Cancel plan in the Plan section. The team then moves to the free Starter plan at the end of the current billing period. More details in this guide: Upgrade or downgrade your plan → Downgrade or cancel your plan.
If you can’t find a paid team on your account, our Customer Support team can locate it for you and review the charges. I’ve opened case: 2221247, and emailed you with the details they’ll need for that. 🙏🏻