Yes, click here for instructions to delete it from your Apple Wallet or here to delete it from your Google Wallet.
To delete it from your Samsung Pay Wallet, open the Samsung Pay app, select the card you’d like to remove, open the menu in the upper right corner, and tap Delete Card.
If you’d like to set up a new card you may do so by following the same set-up steps from within the Afterpay app. It will again be attached to your existing Afterpay account.