Wrong ticket

Hello I bought the wrong ticket and would like to change the date please
How can we fix it

What type of ticket is it?

Supersaver tickets and Saver Day Passes are not exchangeable.

Kind regards,
Roland

This ticket can altered through the SBB Contact Center only. Please call the colleagues at +41 51 225 78 56 (24/7, waiting times may occur).

Kind regards,
Roland

From milan to zermatt 22/2

Adult standard

RolandP danke sehr