3 competitive quotes FEDEX, DHL & Japanese Mail の意味は？

We cannot arrange return shipping from our country, would you please send us 3 competitive quotes FEDEX, DHL & Japanese Mail for shipping back to UK. Once we have received quotes we will PayPal you funds for shipping & on receipt will refund item.
日本から英国に商品を返却する際の送料のことを聞いてきているのでしょうが、 3 competitive quotes FEDEX, DHL & Japanese Mail for shipping back to UKの意味がよくわかりません。
どなたかご教示をお願いします。