Kogan uses Vodafone. Includes all customers, new and existing. You can get a sim or esim. Works out $14.92 a month for 25gb each month.
$179 for 300GB of Data across 365 days – 25GB Per 30 Days
VoLTE and Wi-Fi calling capabilities
BYO Phone number & device
UNLIMITED* standard national calls for 365 days
UNLIMITED* standard texts and MMS for 365 days
Free eSIM card included
All for use within Australia
Additional international roaming, international call, and data packs available
Buy by 30.4
Activate by 31.05
Lebara seems better, $199 for 425gb for 360days, will also get calling to 50 international countries, both on voda too.
https://www.lebara.com.au/mobile-plan/large-360-day-sim/