Disappointment at the theatre

I booked tickets to Selim Kagee at the Pieter Toerien theatre at Montecasino. We were looking so forward to the show. On arrival, the theatre was chaotic. We walked to the entrance to go to our seats. Somebody looked at our tickets and said we could take our seats, which we duly did. 5 minutes before the show started all hell broke loose. The usher was shouting at me for my tickets. Since when do Ushers get off shouting at elderly people! I did not print them and had them on my phone. He continued shouting at me. The more he shouted at me, the more flustered I got and the longer it took me to find the tickets. He screamed at me and told me that I was holding up the show. Everyone in the theatre had their eyes on me. Then he said just leave it! and stormed off. Once I found my tickets, I realised that I was seated in row L and not N. I had made a mistake. What I don't also understand is why the people that had booked those seats couldn't have asked me just to check. The show then started and I sat back in the chair, only to have a metal bar digging into my back. I sat upright for the whole show. The theatre seats need a total redo. They are also dirty. Its the first time I have been to that theatre and it will be the last! Very disappointed with the whole experience. Thank goodness Selim Kagee's show was phenomenal.