Hi chri5046, thanks for your post.
Once the order is placed, I'm afraid the details cannot be changed. The best thing to do for you would be requesting the seller to cancel the order, so you can place the order again with postage method of your preference. If you click here, you can see how to request the cancellation of an order. Please note that the seller is not obliged to cancel the order, but I am sure that if you contact the seller, they'd understand.
Thank you,
Marco
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