Absolutely shocking service at steers - Cape Gate

Went through the drive through as it's suppossed to be quicker. Confirmed the order a few times which was a Get Real Combo and another get real burger both with no sauce and a bacon and cheese burger Combo. We get to the collection window and check our order always when using this drive through as it's honestly incorrect 80% of the time. Low and behold both get real burgers have sauce on which my wife and daughter can't eat. After eventually debating amongst themselves in the kitchen in plain view they bring us the burgers with no sauce. When I check there is only one drink, the woman then argues with me that I didn't order the extra drink, 2 x combos = 2 x drinks not exactly rocket science. her manager then comes over still not a single apology and have officially now been waiting at the DRIVE THROUGH for 25 mins. She then tells me she won't give me another coke until I pay R10.90. I now have about 7 cars behind me all waiting for 25mins to be served. Most of the staff have come out of their sections as the whole chain has stopped and are now just staring at me. Eventually when I told them I was going to complain they gave me 2nd drink no apology at all and just walked away...