Terrible service from Blue Hills McDonald's in Johannesburg

We went to McDonald's in Bluehills this afternoon. We spent over an hour waiting for our food. First they have the new system to order your food but they walk past you and dont assist. My husband was waiting for 20 minutes for someone to help him take our order and pay. There is one lady who was helping at the tills and also opening the door for customers who are leaving the store. When our food finally came, they didn't even have toys for the happy meals we ordered and the Manager was not even helping. She was just standing there and laughing with the other colleagues in the back. No help at all. If they cannot keep up with the demand on a month end, they need to either close off the internet ordering or close the drive through at a certain time for cut off. They also gave us the wrong order. We ordered 2 happy meals, a veggie burger and a cajun chicken burger. They gave us a big mac instead of a veggie burger plus they didn't give our receipt back. This is UNACCEPTABLE