Hello Imke,

Could you mind provide us with a temporary access to your Joomla backend (as admin) and an FTP access so we can check that issue and see where the problem is coming from?
It looks like your account isn't tied up with any subscriptions on our site. Is there any mistake on our end? Would it be possible for you to contact us at https://crm.stackideas.com and provide us with the order reference and your username so that we can fix this up for you?