原因は以下荷物の計測に誤りがあったのではないでしょうか。明らかに御社のミスだと思います。
The cause may have been an error in the measurement of the following package, which is clearly your company's mistake.
なぜ日本に発送指示したものが倉庫に返送されてきているのでしょうか?36.8kgという重量の問題でしょうか??発送前に御社が計測したデータは以下です明らかに30kg以内ですので私が支払った送料は返金すべきです。早急にお返事をください。
Why is the shipment to Japan being returned to the warehouse?Is it because of the 36.8kg weight?The following data you measured before shipping is as followsSince it is obviously within 30kgThe shipping cost I paid should be refunded.Please get back to me as soon as possible.