It just depends on how much time you want to spend to fight and what you have in back up. It can't just be your word against his. You need proof to claim procuring cause. Good luck!
Because people have a real estate license doesn't necessarily mean they are fair or ethical and can make good decisions. We are too often left with the aftermath of dealing with their poor judgement.
Unfortunately core values such as dealing honestly with people, respecting others time and efforts, and rewarding excellent service with loyalty are becoming less common these days.
Try never to become jaded. The following week, I got a call from a woman I showed rental properties to a year before, but she found an unlisted rental. She called out of the blue and said I helped her a year earlier and she wanted me to be her Realtor now that she was ready to purchase!
Whenever there is a procuring cause complaint filed here in Colorado, it never goes anywhere. I talked to someone on the ethics committee out here and he said there has never been a case where the agent filing the complaint was awarded anything.
I'm not sure why that is, but I guess we just have to believe that karma will catch up with him and reward you for your kindness. It still makes me mad as heck when this happens!!!!