Dry chicken with no extra sauce as requested

I ordered food at Nandos Rosebank and was assisted by the lady called Phumzile, I ordered 2 quarter chickens side breasts extra hot with extra sauce and sides of chips, I sent someone to collect it, He came back and we dished up in the plates and while doing that we realised its dry there is no extra sauce , so I checked on the packet for chillie sachets only to find out it was only one hence its 2 meals, so my friend started cutting a piece in his chicken than said its doesn't taste good without extra sauce than I was like let me call them because I cant eat dry chicken also. I called and speak to Phumzile again, I explained the matter than she said she can send another food only if its not yet been eaten, I explain to her that my friend already tested the chicken and she said unfortunately I can be able to give you one meal, than I asked her why because its not my problem that they failed to take an order as I requested than she transferred me to Brian the Manager who also told me same thing, than I asked Brian to give me sauce than as I'm right across the road from them since they cant take my friends food back because its getting cold and it will be more dry, Brian promised to send it as soon as possible , we waited and waited nothing and the thing that irritates me I'm right across the road next to them, so while my friend was about to finish his meal here comes there driver with my food and it was chicken only because I didn't complain about chips, I exchanged food with chips than look for chillie sachets there was nothing, I called Brian while driver was still here and he said he has put more sauce in my chicken so that I can share with my friend, I got so irritated that I just lost appetite and throw the food in my desk, after 5minutes I opened it and I saw chicken swimming in sauce and the sauce was half of the packet and was like wow they just wanted me to back off. I closed the food and called my security to give street kids the food because was so angry and didn't want to call Nandos anymore, after 5 minutes the driver came again with another meal with chips, and I asked what was this for and he said the previous meal didn't have chips than I'm like you should have brought chips only, than he's like its a form of apology from Brian and I said go and tell Brian that I'm not a dog to accept apology from food if he wanted to apologise he was supposed to call me because he has my number. After 5 minutes again he called and wanted to know if my food was ok, told him I was no comfortable by eating it because I've complained a lot so I'm not sure if that food they gave me was hygienically safe so I gave it to street kids, than he started shouting at me that why I didn't return it because now he has to explain as a manager what happened to the food, so I said listen Brian don't you dare raise a voice on me because you guys are wrong here so you better humble yourself and I asked him if there was something else he said no than I dropped the phone. Its a second time now fighting with Nandos Rosebank and its really getting into my nerves