To update your payment details:
Sign in to your Eber business admin> Settings and click on the [Billing] button on the top right.
or use this link : https://business.eber.co/billings/subscription
You may proceed to [Add Credit Card] to enter your credit card details for payment. Next, you may update your contact details from [Update]
You are able to have an overview of your business account status and also you can view your invoices here after you have subscribe to Eber member system.
Your card won't be charge until the last day of your trial account expiry.