Rude staff that laughs at customers

I recently went to Pedros Chicken at protea gardens and wanted to order ola meal I was told that there are no rolls and they can’t substitute. The cashier whose name I didn’t get and another one called Portia continued to give me attitude as if I came to ask for credit when I came to buy. I asked to speak to the manager and eventually someone by the name of Kamo came and tried to assist to my surprise the were rolls and now I have to pay more because these were garlic rolls and they said they were saving them for people who order online. I paid 175 for ola meal because they had to add garlic rolls. I am not sure if the online customers are more important than walk in customers but it gave me a bad sense as to how Pedros sees their customers. I hope this will be amended because why was the door open if certain things are not there that form part of a meal. And not being able to substitute. And I hope you hire better staff who knows when to keep quiet and when to talk.