Hello Folkert
The SBB Community is a customer-to-customer support forum.
If you want to contact SBB, you have to call their contact centre for which you can find the phone number on all websites: 0848 44 66 88 (CHF 0.08 / min, 24/7, waiting times may occur).
Simply pull the screen of your app down, to reload the data. Then it should work.
Kind regards,
Roland