When you buy data from a local vendor they will sell you a voucher with two codes on it:
When you are connected to a Zenzele hotspot the hotspot landing page will have a form where you can redeem your voucher
Your voucher will look something like this:
You enter the ‘Voucher Num’ into the upper box and the ‘Voucher Pin’ into the lower box on the Zenzele hotspot landing page and then click the ‘Login’ button. You will be logged in and redirected to the logged in status screen.