I took a week off work as annual leave to help at a university overseeing some exams..they confirmed that they only wanted me to do 2 days not 5, so I kind of made plans for 3 days that I now have spare. So tonight at 5:30, I get an email reminding me I have 4 days work not 2. What should I do? The money is OK but I am not that desperate for it. Ergh, what to do??