Wizz’s site isn’t exactly known for being perfectly synced in real time.
If it says the offer runs until 13.2, that usually means until the end of the day local time, not that it disappears at midnight. Sometimes the sheet just stays up until they manually refresh it.
It could also be cached in your browser. Try refreshing hard or opening it in a private window and see if it changes.
Wizz IT being a little slow to update wouldn’t surprise me at all.
