Faulty equipment & *********** stff

Tried to book imax tickets online last week, website would not accept my movie or clubcard numbers. Arrived half hour before movie on Saturday, the queue is out the door for the 1 booking counter where an actual human works. At the self-help counter there were plenty of tickets left for the movie, then the pos machine wont work, tried my husbands & my card. Used a different machine, then it wouldnt accept the movie or clubcard numbers. The useless assistant is complaining more about the machines than any of the customers there, yes we were not the only ones struggling. He takes his time restarting the machine because he isnt listening to me when I tell him its the pos not working. We were stood there at least 20 minutes & in that time the tickets sold out. The assistant just shrugs & says we must watch something else. I was so annoyed with him for that too. We left. How can you introduce a system that doesnt work properly and not have enough assistants manning the stations to help people? This is not our first bad experience there. I am so annoyed at having missed the movie, and we cut our day plans short and left early so we could get to your cinema on time. I am so disappointed.