According to the lists by The Girl Who Games, this task should take up to max. 8 hours 45 minutes, depending on the star rating of the used item and your Sim’s mood.
Your screenshot shows there are more than 3 days left. To me it looks like there went something wrong with your device clock.
Did you try to quick complete by using 1 SP for each Sim or even skip with 38 SP? If both didn’t help you may need help from Online Support.
I did try that, but it didn’t work. For some reason it won’t let me use SP to bypass things.
