It is fine to say, "Woman, give me a sandwich, make me a sandwich!!!!!"
It's mean to be so demanding.  Have you spoken to her like this in the past?
Yeah I'm sad and angry. It used to happen all the time. Now she even pretends she doesn't hear me.
It was nice of her to make sandwiches for you then, but if you treat her like this, it's perfectly acceptable for her to refuse to do you any favors.
I don't know how to make them though. She makes them so good!
Don't you think the way that you are asking her is probably making her less likely to make the sandwich? If you really love her sandwiches and would like her to make one for you, just ask her politely.