You can modify your credit card information using the following link: https://billing.stripe.com/p/login/8wM9DBdfmbzdfJKfYY
Once there and after confirming your e-mail with the link that will be sent to your e-mail address, you will be able to manage your account payments, change the payment method and consult your invoice history.
If you have any questions, you can always contact us here: support@calendarspots.com