Hello Geonyoung park
Welcome to the SBB Community. We are customer support page run by volunteering travel experts; we are not the SBB Customer Service.
We do not have access to your customer account and cannot answer questions related to it.
Please contact SBB by phone (+41 51 225 78 56, 24/7, waiting times are possible) or contact SBB by their contact form. SBB does not contact customers by their e-mail; for data protection reasons, you should not mention it on publicly accessible websites such as ours.
https://www.sbb.ch/en/help-and-contact/customer-service/praise-comments/reklamation.html?stepId=3.20
Supersaver tickets and Saver Day Passes are non-refundable.
Kindly keep in mind: Swiss people love to hear a hello before one is asking a question. By doing so, the locals are much more willing to help and it is simply considered a polite behaviour in our country.
Kind regards,
Roland