I will give a womans view or more my view as a woman
Russ if you told her what you need help with and she agreed then you haven't done anything wrong. If she didn't like the subject and said it was ok for you to email her she was accepting that she would help you with this problem.
When it arrived if it was something she wasn't happy doing and only said yes coz she didn't like saying no. Then she didn't need to open the email she could have just said it didn't arrive and she would rather not help...
I wonder if she will say yes to everything rather than face upto what she don't like.
MPO is Russ you haven't done anything wrong and she had no right to complain.