Whether it's updating your credit card information, reviewing your past invoices, or changing your plan, you can do so easily within Demio:
Click on your profile picture in the top right corner, and go to your Demio account settings.
Navigate to the 'Billing' tab.
If you want to update your payment method, click 'Update card details.'
If you want to upgrade or downgrade your plan, simply click 'Choose Plan' next to the new plan that you choose.