Unprofessional Manager on duty

On the 22 October 2017, at 13h42 my friend and I want through the Mc Donalds drive thru in Maitland to buy us meals and received the worst customer service. We ordered x 1 Lrg Cajun Chikn with a green apple McFiź and x 1 XL big Mcmeal with a choc shake. I enquired as to why the mcFiz is medium in size when I ordered it with a large Cajun chkn meal, and he did not respond... He then called someone who came to the window who did not greet it try to explain as to why the mcFiz is medium?? She was very loud and aggresive from the get to, ? and did not explain in a calmly and professional manner. She basically ignored me, and said she is the manager in duty cause I asked.. I was so shocked to hear that she was the manager because of the way she was shouting... she just said that I must call Graham and did not attend to my question. I was so appalled by this experience. i contacted the customer service website to write a review, received a phone call the Enit at Maitland, but no apology was offered it evan a replacement for both meals was offered after this terrible experience. Mc Donalds need to train their staff to be more professional, and to answer quetions are posed instead of just walking away and passing the buck. I still have not heard any response from Maitland McDonald's because apparently Enit want on trainning and has failed yet to contact me as promised by her. ???