Hi Roland, thanks a lot for your reply!
Well, to be honest, the ticket was under CHF 10. But the link says: “For refunds using the form, the deductible amount is CHF 10. No refunds are provided on tickets under CHF 10.” So I am not sure if I should use this.
I just wanted to explore if there was any chance of refund because it was clearly a glitch in the app. I can do however prove that I of course did not travel on both occasions since it is theoretically impossible for me to be simultaneously on two buses.
If there is anything else which can help in this case, would you mind sharing please?