Good for you about going in person. That way, IMO, they can't ignore you or your emails. They have to come up with some type of answer. I can see both sides of the problem...npo and donations, but the npo's need to really understand the donors side also? That by this type of thing happening, it hurts all npo's.
This is just MHO and I hope that you get this resolved soon. Keep us posted please?