Same deal was posted on here back in August, 2021. 

Prepay Plans

SMALL (365 Days | 1.5GB Per 30 Days) - $160.
MEDIUM (365 Days | 4GB Per 30 Days) - $250.
LARGE (365 Days | 15GB Per 30 Days) - $330.

The unique Kogan Mobile voucher included as part of this product is non transferrable and cannot be redeemed for cash. Voucher must be purchased before 11:59pm NZST on 31/03/2022 Voucher must be redeemed before 11:59pm NZST on 30/04/2022. A Kogan Mobile SIM card is automatically included with a purchase of this plan. SIM delivery takes up to 14 working days, after which you can activate your plan. Activation or recharge must be made before the voucher expiry date. Voucher does not apply to subsequent recharges. Voucher cannot be used in conjunction with any other vouchers or promotional offers. For information about how to use Kogan Mobile vouchers