お返事ありがとうございます。
しかし、あなたの設定が問題で購入できません。
一度、設定を変更してくれませんか?
お手数おかけします。
Thank you for your reply.
However, there was a problem with your settings which meant that I couldn`t purchase the item.
Could you change the settings for me please?
I am sorry to cause you bother.