If you scroll over to the end of the 12, you should have the opportunity to see the ones your TV can’t get on the screen all at once.
But if it’s not this, please give more details.
Set a Payment PIN on your account so that no-one but you can buy memberships on it. Check your bank accounts monthly for any other unexpected payments to Now. That way you can at least nip them in the bud, while you and Now figure out whose fault they are.