Hey @easydewdesign, thanks for reaching out! I’ll continue replying in English, please let me know if anything needs more explaining.
Since this involves your specific account and billing history, it's not something I'm able to dig into here on the Forum. Our Customer Support team needs to review it directly, so could you please reach out through the Support Hub?
Seats can sometimes get added automatically when a seat request comes through, depending on how your team's seat approval settings are configured. You can review or adjust that from the Settings tab, see who's assigned to each seat from the People tab, and check your invoices from the Billing tab.
This Help Center article walks through why extra seat charges show up and how to review them: There are additional charges in my Figma bill
Let me know if you have any other questions in the meantime!