Hello there,

Thank you for your question! Could you please send me a private message with your order number? 

In general, you can cancel a travel day any time before the start of that day (00:00 CET). Go to your Pass in My Pass section and tap cancel travel day.

I look forward to your reply!
 

-Annie

Thanks Annie - sent you a message 

My problem is I added a travel day for the current day and therefore could not cancel it. I did not have any journeys on that day but I still lost a travel day due to the set up of the mobile pass.