Student or Learner
One woman wrote a letter to another warning her against something. Later that woman to whom she wrote a letter came to her house to talk to her and she told her:
I tried to help you. When I wrote to you. What goodwouldn’t be warned.
did that do? You’re after me like a bloodhound, and you
Why is she saying you "wouldn't" be warned? Is she saying "Don't tell me later I didn't warn you?"
I'm not a teacher
It seems it simply means "you refused to be warned" just as in I told her not to do it, but she wouldn't listen OR in:
I wanted him to take over my examining work on Saturday, but he wouldn’t. (= he refused) BBC OR in:
-I have loved you ever since I first saw you in this house.
-Pip, I tried to warn you not to love me. But you wouldn't be warned. You thought I didn't mean it. Great Expectations - TCM - transcript