That seems like an over-interpreting of a rather simple fact and relatively simple discussion. Especially since she gave you the power of deciding whether or not to adhere to the cancellation policy, whatever it was.

There's nothing wrong with deciding to leave this particular T if that's what you want to do, but I think you would be better served by being straight with yourself about why that is and without creating drama and pain for yourself by revisionist thinking and interpretation.

You can own your own decision to quit, even if it's just that you feel you'd be better served by switching. You don't need lengthy and explanatory statements that place blame and recriminations upon her hurtful behavior.