Front row seat reserved for the orchestra at the last minute

I was meant to attend tonight's performance (07-04-2026) of Pretty Woman the Musical but when I got to the door, I (and everybody sitting in the front row) was told that we must report to the ticket office. There we were told that our tickets were no longer valid as Row A was now being used by the orchestra. The show has already been running for a week. We received no calls or emails from Ticketmaster warning us of this issue. After we have driven all the way to Artscape Theatre, parked, paid R45 for parking there, and walked up to the door of the venue, we are told 5 minutes before the performance is scheduled to begin that our R600 front row tickets are no longer valid. To add insult to injury Artscapes informs us that WE must now liase with Ticketmaster to either issue a refund or rebook. Very poor planning indeed.