The stuff laughed at me when I complained

I bought 2 similar beef dishes. when my order came, 1 dish had a bone with almost no meat and the othet had enough meat. When i showed the lady who was serving me that the other dish has no meat, she told me that sometimes they get this kind of pieces from the supplier. Then i asked her to change it, she then turned around and continued with her business. When i asked to speak to the manager, the 2 ladies and a getleman started laughing at me.