It's a fee added to the actual ticket price to help cover ticket-related expenses such as bank charges and system fees.
The booking fee is non-refundable.
Online customers can pay by
• Credit & Debit Card
• EFT or direct bank deposit
• PayToday
• PayPulse
(Note that these payment options might close a few days before the event though.)
Besides buying online, you can also buy your ticket at any Model store in Namibia.