No, as a prepay service, you can leave the Kogan Mobile service at any time, but we'll be sad to see you go.
All Kogan Mobile services are prepay and non-refundable. If you choose to leave Kogan Mobile before the end of your Prepay Plan period, or have any unused entitlements, these entitlements will be forfeited once your number has been deactivated or transferred to a new provider.