Hello Howard, good morning. The reservation of your tour was not private, it was a group activity, that is why we told that we did not have the minimum number of participants, so we offered you the option to reschedule the activity. As you can see in the information and description of the tour where you made the reservation, we always clarify this point in all our tours. If your reservation had been a private tour it certainly would not have been cancelled, I think you may have been confused with another reservation.
On the other hand inform you that the phone number you left in your reservation have whatsapp, thats why we could send you the message to tell you what happened and offer options.
We hope this will help you to understand what happened. If you have any other questions, please do not hesitate to contact us.
Kind regards.