Hello Touphoohee36
I regret that you had to shorten your stay in Switzerland. The possibility of cancelling a subscription or ticket and requesting a refund depends on the type of subscription or ticket purchased. I advise you to check these conditions on the ticket itself or on the subscription page of our website.
Here you will find the refund form in case your product is refundable. Please remember that the refund must take place before your subscription or ticket is valid.
if you have any more specific questions, please contact us by phone at 0848 44 66 88
(CHF 0.08/min.) or via live chat as we do not have access to your purchases here on the SBB Community.
I wish you a nice evening,
Chiara_S