This doesn’t make any sense. I am a paid Figma user, and every user I invite to edit needs to pay. Additionally, I can’t use FigJam for free; if I want to use FigJam, I need to pay 5 euros per month. The free version allows me to invite people to edit for free and has three free seats for FigJam. Is that correct?
I hear your frustration and feel for you. It looks like our support team needs to look into your account, so could you please contact them via this form: https://help.figma.com/hc/en-us/requests/new? They can investigate and assist with your account information.