Hello @ttcheng
You can change the means of payment at sbb.ch/en. Please log in with your SwissPass user account and go to «Means of payment». To do this, first delete the saved means of payment. Then enter the new payment method details and click on «Save payment method».
You can use Visa, Mastercard, American Express, Postfinance Card, Diners Club, Reka Card and Twint as means of payment.
If it still does not work, contact us via the following form: Contact SBB Mobile | SBB
Greetings, SandrineS