You can update your payment method directly from your account.
Steps to Update your Card
1. Log in to the site builder
2. Click on your name/icon to go to your Profile page
3. Select 'Plan & Billing'
4. Choose your Website Subscription
5. Click 'Manage Payments and Download Receipts'
6. Enter your new card details and set it as your default payment method
Your future subscription payments will be charged to the updated card.
How do I update my credit card?
Steps for updating your payment method.