To update your payment method in WHMCS:
1. Log in to the Client Area at https://cp.adaptivewebhosting.com
2. Click on "Hello, [Your Name]" in the top right corner
3. Select "Payment Methods" from the dropdown
4. Click "Add New Payment Method" or edit an existing one
5. Enter your new credit card details
6. Click "Save Changes"
Your new payment method will be used for future invoices. If you need to apply it to an existing unpaid invoice, go to the invoice and select the new payment method before paying.
