Hello Weadoikoix64
She told me to contact you.
Welcome to the SBB Community. We are not the SBB Customer Service, we are a customer support page run by volunteers.
Unfortunately, you refund the claim 1st class tickets as you do not have a proof that you did not travel in 1st class. You cannot change classes during the ride, this can only be done at the next stop.
Kind regards.
Roland