Hello @Maureen
Thank you for your query.
No, the ticket is only valid for the booked date and time. If you want to use another connection, a new ticket is necessary.
We cannot make any changes to your ticket. For a possible refund please contact directly our ticketshop by e-mail: ticketshop@sbb.ch.
I wish you a nice day.
Greetings,
FatimaH