まぁそうあわてなさんな。話が終わったわけじゃない。しまいまできいてくれたまえ - lucifuge @Wiki

中学校レベルで書けそうか？

Please don't be in such a hurry. I have not finished talking.
Please listen to the story at the end.

"終わりまで"が怪しい。"till it ends"をサッと表したいのだが・・・

模範解答

Don't be in too much of a hurry. I haven't finished talking yet.
Please hear me out.