Pathetic Service

I went to the ballito Junction Nandos. I asked for extra sauce. I requested for more sauce and with arrogance from the manager Mlu I was told they can't not add more sauce. According to him it was enough sauce but he didn't not pay for my meal to to decide if it was enough or not. I then said I will pay more for the basting sauce. The manager Mlu said they do not charge. Why did the manager refuse to add more sauce to my meal if it is for free. His attitude was pathetic... Horrible experience