You can track your usage directly in your online account, in the "Recharge" tab, then "Consumption".
You'll find all completed and ongoing charging sessions, and you can also download a summary of all your usage in Excel format:
You only pay for what you use, nothing more. Also, keep in mind that charging stops automatically at our stations once the vehicle is fully charged.
Your invoices are always available in your app, in the "Account" tab, then "Invoices".