Poor service and bad attitude - Kong Tai

Went to kong tai on a Groupon for the 22 piece sushi platter. Asked the waitress if the platter comes with any vegetarian sushi as my wife only eats vegetarian sushi, she goes away and comes back giving us a list of the sushi and there is cucumber maki with prawn tempura, etc and we said that's fine since it had the Avo Maki. The next thing we see her bringing a whole VEGETARIAN platter! We argue for a bit and we tell her to call the manager, manager argues for a bit and agrees to change the platter to the original. When the platter comes back its still the VEGETARIAN sushi platter. I was fuming at this point , but said what ever its a waste of my time arguing with people who don't speak proper English. The voucher comes with green tea, but we had to ask for it when we were almost finished. When we ask for the bill they give it to us with with the tip already filled in, the service was poor the sushi was poor and the staff/manager were poor. All I can say is I will never be going there again and i will never refer anyone to them in my life.