For getting Cashback on Payment via PayZapp Wallet, you have to select PayZapp Wallet at Payment Page.
Also you need to apply a Promocode after you select PayZapp at Payment Page, to get 5% CashBack in PayZapp Wallet.
No Cashback will be credited if you make the Payment using PayZapp Prepaid Card Number or without applying the Promocode.
Tncs are also available in PayZapp App offers section.