Hello Lynne_L.
Thank you for taking the time to review your experience.
The museum operates all days of the week and does so strictly on bookings as stated in the information supplied:
Before you go - Tours are 9am, 11am, 1pm & 3pm. Bookings are essential: Phone: +27 21 404 1967.
You must have missed this crucial information when you booked.
We are happy you enjoyed the tour after-all.