ctrlpanel/app/Classes/Settings/Invoices.php

<?php

namespace App\Classes\Settings;

use App\Models\Settings;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;

class Invoices
{
    public function __construct()
    {

    }

    public function updateSettings(Request $request)
    {
        $request->validate([
            'logo' => 'nullable|max:10000|mimes:jpg,png,jpeg',
        ]);

        $values = [
            //SETTINGS::VALUE => REQUEST-VALUE (coming from the html-form)
            'SETTINGS::INVOICE:COMPANY_NAME' => 'company-name',
            'SETTINGS::INVOICE:COMPANY_ADDRESS' => 'company-address',
            'SETTINGS::INVOICE:COMPANY_PHONE' => 'company-phone',
            'SETTINGS::INVOICE:COMPANY_MAIL' => 'company-mail',
            'SETTINGS::INVOICE:COMPANY_VAT' => 'company-vat',
            'SETTINGS::INVOICE:COMPANY_WEBSITE' => 'company-web',
            'SETTINGS::INVOICE:PREFIX' => 'invoice-prefix',
            'SETTINGS::INVOICE:ENABLED' => 'enable-invoices',
        ];

        foreach ($values as $key => $value) {
            $param = $request->get($value);

            Settings::where('key', $key)->updateOrCreate(['key' => $key], ['value' => $param]);
            Cache::forget('setting'.':'.$key);
        }

        if ($request->hasFile('logo')) {
            $request->file('logo')->storeAs('public', 'logo.png');
        }

        return redirect(route('admin.settings.index').'#invoices')->with('success', __('Invoice settings updated!'));
    }
}