영작좀 부탁드려요

[영작]

주문할때마다 내가 카드로 결제를 했는데
연체되었다는 레터를 받았다
왜 내 어카운트에 결제해야할 금액이 남았는지
궁금하다


쇼핑몰에서 쇼핑을 할때마다 카드로 결제를 했는데
현재 미납요금이 있다고 편지를 받았어요
그래서 싸이트에 들어가보니 제가 결제해야할 금액이
400달라정도 되는데 이해가 안가서요

부탁드립니다

[작은도움]

I recently received a letter from you stating that I owe you money.

I do not understand why I still have account payables because I have not failed to make payments every time I placed an order at your shop. No exceptions.

Please reply with your answer in details. Thank you.

[...]

Dear Ms Shinnanda,
This is an inquiry about my account balance. I have been using my card whenever I go shopping, but recently I got a letter that there was some overdue (amounted to $400) in my account. I would like to know more about what went on my account.
Sincerely,