Hi, on kingsday (27 april 2022) I traveled from Vlissingen to Maastricht. I used my OV chipkaart with 40% discount subscription. Today when I checked the NS app, they are charging me 33€ pero trip (66€ in total), even when if I look at the price on the app it says its 27€. What can I do?/Why is this?
![](https://uploads-eu-west-1.insided.com/ns-nl/attachment/5e935e97-5e68-4336-aa76-e1c36f948493.jpg)