Bad Attitude and staff needs proper training!!!

Hi. Two weeks ago I made a booking on Groupon for x02 movie tickets and a popcorn and cooldrink voucher. The movie starts 11:45 for 12pm. Because I bought the vouchers already, I decided to go to the entrance where the person takes tears your ticket off and you enter. When my boyfriend stood in the queue I went to ask the guy that was standing there yesterday if I CANT use the KIOSK to select my movie as the voucher was already paid for and he tells me NO I CANT. I went back to queue and finally when we got to the counter I asked the lady about using the voucher at the KIOSK and what does she say? YES I CAN USE IT AT THE KIOSK. The damn idiot made me miss 30 minutes of my movie and the attitude he gives me for being wrong. I was disgusted how someone like that works at Nu Metro. If you not happy working those hours then why bother being there!!! I'm always at the movies but what a terrible experience yesterday and why does the ticket counter only have 1 person helping out when there's over 60 people standing the queue. Pathetic!!!