Poor Attitude and Service - McDonald's Glengarry

Newly opened McDonald's Glengarry, Vredekloof, Cape Town: Went to the newly opened McDonald's at Glengarry Shopping Centre today, however I'll never return based on my first experience there. Using the drive thru, I stood waiting to place my order, however there was no engagement from an employee to take my order. I proceeded to window 1 to place my order. Nobody visible at the window, but eventually a man came walking up and I explained why I didn't place my order at the mic. He said was because they were "busy" and I must drive around to try again. Now I'm already frustrated because of that comment and I said NO, so he then said he'll call a manager to take my order. A woman then came to the window and I again explained why I couldn't place my order initially. She then said, with an attitude, that they were busy. Firstly, there were only 2 vehicles in line waiting at the collection window when I arrived at the restaurant, so how is it that dedicated staff for the drive thru are busy? Secondly, I don't appreciate being engaged with when it's accompanied by a bad attitude, especially from a "manager"! That new branch lost me before they even had me as a client.