Right now, out payment system unfortunately does not allow for changing details of your payment method (credit card) while on an ongoing subscription. So if you need to change details of your card, or change to a different card entirely, you'll need to remove the payment method completely, from your User Settings Page
. But because the subscription is tied to the card, all remaining - paid for - days will be forfeited if you remove you payment method.
Therefore, the suggested way to do this is to let your current paid for days run out, then remove your payment method, and then start a new subscription with your new card details.
Sorry for the inconvenience!
/ JohanR, ScoreCloud