Svelte Swiper is causing unexpected @ in /swiper/swiper.scss

So, I am building a site using svelte and I am using swiper for one of the functionalities but I get this error that states [!] Error: Unexpected character '@' (Note that you need plugins to import files that are not JavaScript). So this states I cannot use the @import directive in scss which from my research I found that my svelte app doesn't support scss files. Scss preprocessers are required in the rollup.config.js. But plot twist I have scss support and I use scss in my project instead of normal css. Here is my rollup.config.js

import svelte from 'rollup-plugin-svelte';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import sveltePreprocess from 'svelte-preprocess';
import typescript from '@rollup/plugin-typescript';
import css from 'rollup-plugin-css-only';

const production = !process.env.ROLLUP_WATCH;

function serve() {
    let server;

    function toExit() {
        if (server) server.kill(0);
    }

    return {
        writeBundle() {
            if (server) return;
            server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
                stdio: ['ignore', 'inherit', 'inherit'],
                shell: true
            });

            process.on('SIGTERM', toExit);
            process.on('exit', toExit);
        }
    };
}

export default {
    input: 'src/main.ts',
    output: {
        sourcemap: true,
        format: 'iife',
        name: 'app',
        file: 'public/build/bundle.js'
    },
    plugins: [
        svelte({
            preprocess: sveltePreprocess({ sourceMap: !production }),
            compilerOptions: {
                // enable run-time checks when not in production
                dev: !production
            }
        }),
        // we'll extract any component CSS out into
        // a separate file - better for performance
        css({ output: 'bundle.css' }),

        // If you have external dependencies installed from
        // npm, you'll most likely need these plugins. In
        // some cases you'll need additional configuration -
        // consult the documentation for details:
        // https://github.com/rollup/plugins/tree/master/packages/commonjs
        resolve({
            browser: true,
            dedupe: ['svelte']
        }),
        commonjs(),
        typescript({
            sourceMap: !production,
            inlineSources: !production
        }),

        // In dev mode, call `npm run start` once
        // the bundle has been generated
        !production && serve(),

        // Watch the `public` directory and refresh the
        // browser on changes when not in production
        !production && livereload('public'),

        // If we're building for production (npm run build
        // instead of npm run dev), minify
        production && terser()
    ],
    watch: {
        clearScreen: false
    }
};

Now this is the part where I import this is the exact code in swiper's official docs for svelte (https://swiperjs.com/svelte):

<script>
    // import Swiper core and required modules
    import SwiperCore, { Navigation, Pagination, Scrollbar, A11y } from 'swiper';
    import { Swiper, SwiperSlide } from 'swiper/svelte';
    // Import Swiper styles
    import 'swiper/swiper.scss';
    import 'swiper/components/navigation/navigation.scss';
    import 'swiper/components/pagination/pagination.scss';
    import 'swiper/components/scrollbar/scrollbar.scss';
    // install Swiper modules
    SwiperCore.use([Navigation, Pagination, Scrollbar, A11y]);
</script>

Anyone please answer this question.