I am trying to purchase a renewal to my plan. First it gives a sub-total of NZ$34.99 which I am happy with. Then when I put in my payment details and go to pay, it now has a total of NZ$40.24. What on earth is the extra $5.25 for, as it doesn't give a reason for this anywhere??? It's not like you are sending the software to me in the post....I don't want to purchase until I know what this extra cost is for, as it seems totally unjustified