MPD Horror Story

So I was making calls tonight, and I called someone who gave $100 per month during my internship to set up an appointment (we had connected last month but he was busy and so he told me to call again in a month). And he owns one of the two pharmacies in town. As you may know, I had my wisdom teeth out last week, and before the surgery they asked me which pharmacy to fax my prescription to and I went with the one from my supporter. Well I guess after the surgery (when I was completely out of it), my mom changed it to the other pharmacy, since that's the one she always went to and she didn't know that they supported me. But I guess the dentist had already faxed it to the 1st pharmacy and then the dentist called them back and said that we'd had it changed, so they should cancel that order. So when I got on the phone tonight with him I got literally chewed out for about twenty minutes. I apologized and was able to tell my side of the story, but he didn’t seem to care that it wasn’t me that changed it. In the end, his argument remained the same: “I donate thousands of dollars to the community and to you, and you think that would be worth a little business.” And then he yanked his support and said he probably wouldn’t change his mind unless he “had a chat with my mom.” I talked to my parents about it tonight and told him what he said. I didn’t pressure her at all one way or the other cause I think he’s being kind of unfair. In fact, I'm not too sure that I want her to talk to him at all. Him supporting me doesn't really involve her. He should be giving because of the cause, not business. Regardless, I’m not really sure what to do about this. I didn’t do anything wrong and my mom didn’t do anything wrong. I’d love to blame the dentist, cause what they did was fairly stupid, but that won’t fix things. It’s just a really unfortunate situation. I hate losing $100 per month, and it’s really discouraging, but I have no idea how to fix things and make everything good again. Bleh on the fallen world.