Very BAD atttitude and Argueing with clientt

I ordered a dish, Mediterranean pasta, it came out undone, they had not put all the ingredients that go into the pasta.called the waiter asked what was going on,he called peter his manager,he argued with me in the middle of a full restaurant and told i will not order another dish will have that one as is!he then went to call his kitchen manager Terry who had and even worse attitude and told me he knows his kitchen,and what was served was as it was supposed to be,i then indicated to him he clearly has no knowledge of his menu,preparation method and end end product, he proceeded to scream at me again in the middle of a full restuarant and told me to either have the dish or leave the restuarant,turned his back and stormed off!i was left unattened to for the next 20min, i had to call the waiter and ask for service.Terry at the end of the evening then demanded i pay for a dish i didnt have as i sent back to the kitchen.the service was appauling!please could rapsodys make sure they train their managers on product knowledge properly and have tip top customer service atiquette!its unacceptable that managers working in a customer service environment treat customers so RUDLY for paid service