I want to cancel the credit card binding or cancel this account.
Sure thing! Canceling your account is something that you would need to handle from your end. To cancel account your account in Cloud Manager navigate to the Accounts tab and there will be an option to "Close Account" on the right-hand side. For more detail about this process, here's a link to our documentation with more information:
If you have any account specific questions, just open a support ticket by clicking "Get Help" from your Cloud Manager.