How to redirect to not found page if slug doesn't exist using React Router Dom?

Let's say I have these routes:

<Switch>
  <Route exact path="/myflix/:slug" component={Home} />
  <Route exact path="/myflix/:slug/register" component={Signup} />
  <Route exact path="/myflix/:slug/event" component={Event} />
  <Route exact path="/myflix/:slug/contact" component={Contact} />
  <Route exact path="/myflix/:slug/login" component={Login} />
  <Route exact path="/myflix/:slug/show-details" component={ShowList} />
  <Route exact path="/myflix/:slug/*" component={NotFound} />
  <Route path="*" exact={true} component={NotFound} />
  <Redirect to="/not-found" />

  {/* <Route path="*" element={<NotFound />} /> */}
</Switch>

We have certain slugs from an API, in this form:

[
  {
    id: 1,
    title: "_flix",
    slug: "_flix",
    status: true,
    viewTime: null,
    langue: null,
    createdAt: "2021-06-24",
    updatedAt: null,
  },
  {
    id: 9,
    title: "test_flix",
    slug: "test_flix",
    status: true,
    viewTime: null,
    langue: null,
    createdAt: "2021-06-24",
    updatedAt: null,
  },
  {
    id: 10,
    title: "flix_2",
    slug: "flix_2",
    status: true,
    viewTime: null,
    langue: null,
    createdAt: "2021-06-24",
    updatedAt: null,
  },
]

When I make an invalid slug, I want to redirect to NotFound page:

useEffect(() => {
  getSlug(slug)
    .then((res) => {
      const { id } = res.data;
      document.title = res.data.title;
      getSetting(id).then((result) => {
        setStyle(result.data);
        getLangue(id).then((res) => {
          setlang(res.data.langue);
        });
      });
    })
    .catch((error) => (window.location.href = "/not-found"));
}, [slug]);

I used the above code (see the .catch), but when I make an invalid slug, it redirects not found page and refresh the page. I need to redirect without refreshing. Any solution?

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