Idiom
have seen the last of someonehave heard/seen the last of (someone/something)
if you have heard the last of someone or something unpleasant, they will not cause you any more problems in the future.It's a worrying problem and I dare say we haven't heard the last of it.
(often negative)
He's a very unpleasant man. I sincerely hope we've seen the last of him.