Scaring of tourists

*grr* When i tried to go to work this morning, ÖBB decided to cancel the 9.25 S7 from Wien-Mitte because of construction works somewhere else (Florisdorf?).
But why can’t they just tell the potential passengers. There was zero announcement neither via the display nor via the speakers.
Especially the tourists that wanted to leave via the Airport were very confused and had to switch to the expensive CAT train or take a taxi.
I decided not to wait 30 minutes for the next S7 to arrive at 9:55 and went to university instead.