"Save it!" and puts up their hand, what do you say the next time you see them?

I had a parking incident with a father at preschool and he was super pissed. I tried to apologize but he shouted save it and walked passed me. He then reported me to the director. His son will probably be at the birthday party I'm heading to now. Do I apologize again or "save" my apology?

Our parking lot is awful and causes lots of conflict. I stand by my choice but I did inconvenience him.