Limitation of buffet consimption

A few friends and I went to the Adega Boksburg. I love their sunday buffet therefore I ordered it. On my fifth plate of the buffet the owner/manager comes to our table and tells me to stop eating the prawns, there are other items on the table. She told me that by me taking the prawns I am telling her that I do like the rest of their food. Then as my friend was complaining to her she walked away from him ignoring what he had to say. This was just the worst experience I have ever had at a restaurant.