영작 부탁드리겠습니다
반품을 취소하는대신 나에게 300불을 환불해달라 당신도 배송비 때문에 손해고 나도 바쁘다.
그러니 부분 환불해주고 끝내자
I would like you to suggest a proposal. The shipping charge being considered, returning it would not be good for you and me. So I would like to settle this issue if you refurn the partial amount, that is, $300.
What do you think about it?