你欠我一句对不起,但我永远不会再说没关系用英语怎么说

you must be apologize but i couldn't forgive you

you owe me a word "sorry";but i will not say "that's all right" forever.

You didn't say you are sorry,but I already never mind it.或者
You still own me a sorry, but I never say it's doesn't matter.随便翻的啊，给个面子啊。

You owe me a sorry, but I will never say never mind.

楼上完全直译嘛,一看就是翻译软件应该这样：
You should beg my forgiveness,but I would never say it does not matter

You owe me an I'm sorry, but I would never say it does not matter 。
呵呵 ，