Maybe write her a letter, Steph. And I mean write. By hand. Not email or text. Just don't post it for a couple of days until you are sure that you are capturing what has pissed you off (disregard of a specific request) rather than making it about her or giving her ammunition for the future. By that I mean don't attack her; just say you are disappointed that she ignored your request and that you are unhappy about the situation. That your feelings have been hurt. Leave any speculation about her motives or the ramifications of her actions out of it. If you still feel the same after you have reread it and passed the outraged stage--which can take a while--send it. Or burn it. Marg