I've cancelled the itinerary as a whole and booked out of Leeds instead.
It's a shame as I love Doncaster airport and will continue to use it with TUI's flight-only options but I simply won't ever risk booking with Wizz again.
They arrived with much fanfare and promotion across South Yorks but if they can't seem to maintain any semblance of a schedule I'm not sure why they even bothered to open a base at DSA.
DSA's proven to be a somewhat difficult market to succeed so burning their customers hands with (likely) their first experience with Wizz isn't going to assist them.