Hi,
I bought 3 SuperSaver tickets with a Swiss Half Fare Card - 2 adults and one child ticket, each costs CHF 18.80 and paid CHF 56.40 in total. I bought the tickets via SBB mobile app with a login account. I realised the following day that I should have not bought a ticket for my 10-yr old daughter as children below 16 are free to travel with a Swiss Family Card. Would it be possible to get a refund of the CHF18.80 for the child ticket?