Did you get good content for your portfolio? If so, mission accomplished.

When you shared your images with vendors and the venue owner, did you set any terms of use in a contract or did you just give them your images? It’s reasonable to expect a credit as photographer when your images are shared online but if you didn’t require this in a signed contract in advance then it sounds like you should just put this down as a lesson to communicate better and more formally in future and move on.