It's called life, these things happen. 9am is a pretty decent time, heck that's one hell of a sleep in for me in general since I'm usually up at 5am to leave for work.
Sure, it may be annoying, but I pay rent in a flat and have three other people living here. They've woken me with similar stuff on my days off, but they didn't do it with the purpose of waking me, so there was no point getting mad. Besides, it's your mother, she raised you. I wonder what you said to her that got that reaction, if you were calm and asked nicely what she was doing sh may have apologized for waking you up.