Truly pathetic Nu Metro experience

I booked my tickets for my daughter and myself online and went to the Nu Metro cinema in Canal Walk. When we got there the place was very busy but the line for the machines to print out the online tickets was practically empty. This is the reason one books online after all. When i typed in my reference number it accepted then it asked me if i wanted to buy snacks. I said yes and from there on it went downhill. my card kept being declined so i could not even get my tickets. This whole debacle made myself and my daughter terribly late for the Lilo and Stitch movie. Then when i asked one of the assistants about it she steered me to the immensely long line that i had to stand in to get my already paid for tickets and purchase snacks. I told her that this is the reason i bought the tickets online so i didn't have to stand in a line. Then she rolled her eyes at me, wonderful service, thank you Nu Metro. This experience turned a wonderful Saturday evening with my daughter into a very frustrating one. My issue is that the staff know that this is a problem but nothing gets done about it and spoils many peoples movie going experience. This is truly pathetic Nu Metro.