降車後にネット決済の取り消しや支払い方法の変更はできますか？
(English below)
降車後にネット決済の取り消しや支払い方法の変更はできません。
参考
Can I cancel the online payment or change the payment method after drop-off?
No, it is not possible to cancel online payment or change the payment method after the vehicle has been disembarked.
Click here for more information about online payment.