The problem is you are too young, your maid 37 may not listen to you. Is your maid the first time in Hong Kong? May be you need to set a timetable for her, e.g. how long she need to massage with your mother, and the rules and regulation at your home.
Is her Indonesia?
write a warning letter to her, saying that she doesn't obey your order. Next time if she's sick, get her a pill (panadol).
But if your father doesn't say a word, it's diffilcult for you. Just try one holiday on weekday, tell her becoz you don't satisfy with her performance so she can't have holiday on Sun.
見你工人咁樣, 要黎一個下馬威.