A man pushed me very hard, while accusing me of hitting his dog with my cane as I tried to separate an attack on my pup! Can I get help?

While visiting a dog park, this owners aggressive dog growled and launch upon my puppy's back to attack him. I used my cane trying to separate them, but it was hard, as I constantly yelled "get your dog, get your dog!" The owner was only a few feet from me but responded slowly! After the owner pulled his dog from off my puppy, he suddenly and forcibly with rage pushed my right shoulder very hard; accusing me of hitting his dog with my cane. I told him that was not true and I would never do that not even when another owners dog attempted to attack my puppy. My husband was heading towards us when he saw this man aggressively push me, he was furious and suddenly appeared between us and pushed the man away from me, while saying, "you put your hands on my wife? Man, don't you ever put your hands on my wife again!" The man kept saying something and I told my husband he wasn't work it, let's go! Then I loudly reminded other owners (about 10) who witnessed this assault/battery, that all of us are to be responsible for our fur babies and told that guy to never put his hands on me again! This incident shocked me, disturbed my sleep, aggravated my right shoulder, and upset my puppy!