ご連絡ありがとうございます。
お支払いが済んでいますので【Payment】画面に戻れません。
【Shipment】画面から配送方法の変更は出来ますか?
Thanks for your contact.
As the payment was completed, you cannot return to the 【Payment】page.
Would it be possible to change the method of shipping through 【Shipment】page?