If your complaint doesn't require an immediate response, it often helps to complain by letter.

如果你的投诉不需要立即答复，那么写信投诉通常是有帮助的。

Does it require an immediate response?

是否需要立即作出反应？

I look forward to your immediate response.

期待您及时答复。

His accusations brought an immediate response.

他提出指控后迅即得到答复。

Mr. Paterson's office had no immediate response.

但是帕特森先生的办公室并没有立即做出反应。