McDonald staff bul**** my 6 years old daughter

So on Sunday 10th of October I went to buy food for my kid,when we arrived the lady started to help us place an order...so we started chatting and she ask why I don't order a bigger burger because my kid is big and fat...I kept calm and she went on saying I should watch her diet,further say that by age 14 she will be size 38,so I want to lay a complain,I want her out of the restuarant because she is a bully and place like McDonald should be safe space for our kids to eat and be at peace for once,because the world is already cruel to them .She is just a 6 years old she deserves to be just a kid