Double Booking/ticketing

This happened when I bought pre-tickets back in January for the 14th of February. Firstly, used my debit card at the cinema to buy the tickets, apparently the printer of the tickets had a malfunction, therefore I was given an A4 paper clearly stating my seats for the day. Thereafter, on the day I walked in at the cinema only to find the row of my seats filled, it didn't make sense. I went through to check with the people on my seats, and they were ticketed for the exact seats. How embarrassing it was for me, because my girlfriend was witnessing all of it and seeing me frustrated. I went up to one of the employees to be assisted, I told him what has transpired, he seemed confused too. He checked with the people occupying the seats, and got the same result there was a double booking or my seats were sold to the other clients. What I got after that were seats I was uncomfortable with, and to put the cherry on top the I spent 40minutes on kiosk queue to get popcorns. I only got to watch 40 Shades Of Grey! The booking was useless! Only thing of convenience was not queuing for tickets. All this nearly ruined my Valentines, never again am I buying pre-tickets. [Email Removed]