Macdonalds Beacon Bay

Was a Beacon Bay MacDonalds drive through today lady taking orders rude.Long line with slow service.I was in the Beacon Bay area as I normally go to the Macdonalds in Amalinda. Never the less I got home to open my order just to find that I didnt receive what I paid for.I ordered 4 x Big Mac burgers however received only 3 burgers 2x Big Mac burgers and a burger with some kind of chilli sauce. Which I didnt order.So incorrect order and a burger short of what I paid for.Will definitely not be returning to Beacon Bay Macdonalds service is BAD!