paypalの履歴を見ると9月17日にあなたの所に振込んであり、万が一、振込みが完了していなかったのではと思い、先程再度振込んでみた次第ですが、如何でしょうか？通常はちゃんと振込まれていたら同じ請求書で2回払いできないシステムなので、前回のは振込まれてなかったのかもしれませんが。今回は、ちゃんと振込まれているかどうかご確認ください。もし、振込みがされていないならば再度連絡をください。よろしくお願い申し上げます。
There was already a payment made to you after I took a look at PayPal's history of payment on 17th of September, however, it might be because the transfer wasn't completed. I have remade the payment just now, so how is its status? Normally, since it's a system where you can't pay twice if the transfer is completed, it might be because the payment made last time wasn't truly transferred. Please confirm if the payment was properly transferred this time. If however, the transfer is still not completed, please contact me again. Best regards,
