A great exhibition let down by terrible customer s...

A great exhibition let down by terrible customer service.
Loved the art and the experience and spent a good 2 hours here. We didn't choose to queue for the popular attractions, but that was our decision and we enjoyed the rest.
The customer service upon entry however left us flabbergasted and disappointed with our visit. My friend purchased 6 tickets and as we were all arriving seperately distributed them to us (as per the instructions on the website). However when we arrived our codes said that they had already been used. Apparently when distributing the tickets there was a further step that was not made clear to my very careful friend where the QR code had to be reset. After speaking with the staff and presenting the booking details we escalated our issue to the manager. The manager was rude and argumentative and suggested that foreigners often got this wrong and always expected the issue to be rectified and that no exceptions could be made.
TeamLab, we did not try and get in for free. In fact, 2 of us paid twice due to you being so inflexible. If you're suggesting that this has happened to people before then your system may need to be reviewed. We were so disappointed by your manager's attitude that it impacted on our visit.
The exhibition is not worth paying the money we did (twice). Definitely worth paying once. Group bookers, beware!