Removing card details after Kogan activation

Hey guys, just activated my Kogan 365 day SIM (the 250gb BOGOF deal).

Not familiar with Kogan/prepaid in general, so - Can I confirm that it's okay to remove my card details straight away off my account so I won't accidentally be charged after 365 days, and the service will still be as normal and in use? Knowing me, if I don't take action now, I'll probably forget and will be charged next year.

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