How dare you not let my angel break your nose

So this happened a year ago I will be me and Entitled parent will be EP The kid Brat I’m now 11 btw

So I was walking to my local shop (tesco) to get some Pringles and enters brat At first he just looks at me and continues searching for what he wants we meet outside where he randomly decided to start throwing punches at my face so I just pinned him to the ground (he looked younger than me so I did not want to hurt him) and yup you guessed it EP comes in WHAT ARE YOU DOING TO MY SON I explained what happened but all she did was started shouting at me EP said WHAT AGE ARE you Me: 10 EP:He is 8 you monster you should have let my son hit you Brat hit this boy he didn’t get up so she started screaming at me and since I had no Idea of what I should do I Just Ran