Went to a restaurant in Cape May with my wife and children, ages

Cape May - Went to a restaurant in Cape May with my wife and children, ages five year old and six months. I ordered my five year old an apple juice and the waitress bought two out thinking my five year old wanted one even tho we didn’t order. And told her that. We got the bill at close to a hundred dollars and got a three dollar charge for credit card use. Well instead of leaving a twenty percent tip I took off the three dollar credit card charge as well as the four dollar apple juice she charged us for we didn’t order bring her tip to thirteen and yes I didn’t tip on the tax. Tired of restaurants ripoff