Kiddies at the drive thru window

We know it’s school holidays, and you are hiring students now but please, training is very important and also just listen to these guys conversations with us, I had a guy fight me after I ordered through the drive through, he gave me half my order and when I told him it’s not complete he argued, I told him to check the slip which he hadn’t given me because he said machine was jammed, I told him to check his POS system but still fought me, I asked him to just apologise and admit that he did not punch in everything so that I can also calm down because he is young and I don’t want my family to see me fighting with a child at the drive thru.