incorrect order given to customer. bad attitude. stinking attitude

I went to Nando's port Shepstone, my order number 573. I ordered Mild Nandos full chicken, and it way a takeaway. when we got home, it was actually hot spice that was used and the Nandos had a mild blue tag. we always buy nandos from scotville in pmb we have never had this problem. so I took the food back, spoke to the manager Zanele, she started arguing with me, saying shes not gonna change it for me, because its a loss for the business. I thought Nandos was all about good customer service. Nandos port Shepstone is only passionate about making money not good customer service. so we contacted customer care, and that's the only time she realized we were serious. its been 14 hours since we reported the incident, no apology yet. oh by the way another thing that made me angry is that the two front line staff members were also adding to the argument, so I got victimized by 3 Nando's staff members. the names are Zanele (manager, Thandeka and Mabo, by the way Mabo did not have her name tag on, I had to ask for a name. I told the manager that we never buying from Nando's port Shepstone again, she said we better not. I have never experience such trauma in my life. the staff members gave nandos a very bad name. we demand an apology.