The sbb website is offering a "Day pass for 2" through its website - scheme valid till 5th Nov.
My family (husband, myself, 2 daughters age 9, 14 yrs) is travelling to Switzerland on 17th Oct. We bought a "half fare card" valid for a month for my husband. My understanding is that based on "half fare card" and "day pass for 2" , our travel should become totally free.
But, when I try to book tickets for all of us from "Basel SBB" to "Interlaken OST" through sbb.ch, it does not recognize/give the option to select "Day pass for 2". Also, it does not allow kids for free, rather charging 50% of each of them.
Can you please help? Am I missing something?