Dear mike,
Perhaps her comment was inappropriate, but not illegal or flagrantly unethical? I don't know the situation. Would complaining help the situation for you? Or cause further anxiety?
When you meet with the coordinator, I'd be careful about approach. I've found it very helpful to avoid confrontational language and instead appear to ask for help. So I would say "Please help me, I do not understand..." rather than "You should not have said..." That way you do not put the other person on the defensive, and if you truly did not understand you'll get an answer.
You have not failed, but have succeeded in offering of yourself. Not every proposed donation is completed. Nevertheless everyone who volunteers to donate is selflessly giving.
Love, elephant