If you do not recharge your account after your plan expires, you will still be able to receive incoming calls and text messages for 20 days, and make calls to emergency services for 90 days. To assist you to recharge your account, you can reach Kogan Mobile Customer Care online here, even if you don't have an active service.
Please note: Your mobile phone number will be reserved for 90 days past plan expiry. If you do not recharge within 90 days, you will not be able to keep your existing mobile phone number, and your account will be deactivated. Once your mobile number is lost Kogan Mobile is unable to retrieve it for you.