Contact us page receive information but not getting message

See the contact us page here.

This is view file of contact page.

    <div class="section-title">
      <h2>Contact</h2>
      <h3><span>Contact Us</span></h3>
    </div>

    <div class="row" data-aos="fade-up" data-aos-delay="100">
    </div>

    <div class="row justify-content-center" data-aos="fade-up" data-aos-delay="100">

        <div class="col-lg-9">
        <form action="" method="post" role="form" class="php-email-form">
            @csrf
          <div class="form-row">
            <div class="col form-group">
              <input type="text" name="name" class="form-control" id="name" placeholder="Your Name" data-rule="minlen:4" data-msg="Please enter at least 4 chars" />
              <div class="validate"></div>
            </div>
            <div class="col form-group">
              <input type="email" class="form-control" name="email" id="email" placeholder="Your Email" data-rule="email" data-msg="Please enter a valid email" />
              <div class="validate"></div>
            </div>
          </div>
          <div class="form-group">
            <input type="text" class="form-control" name="subject" id="subject" placeholder="Subject" data-rule="minlen:4" data-msg="Please enter at least 8 chars of subject" />
            <div class="validate"></div>
          </div>
          <div class="form-group">
            <textarea class="form-control" name="message" rows="5" data-rule="required" data-msg="Please write something for us" placeholder="Message"></textarea>
            <div class="validate"></div>
          </div>
          <div class="mb-3">
            <div class="loading">Loading</div>
            <div class="sent-message">Your message has been sent. Thank you!</div>
          </div>
          <div class="text-center"><button type="submit">Send Message</button></div>
        </form>
      </div>

    </div>

  </div>
</section><!-- End Contact Section -->

This is Controller code of contact us page.

    public function store(Request $request)
{
    Contact::create([
        'name' => $request->name,
        'email' => $request->email,
        'subject' => $request->subject,
        'message' => $request->message,
    ]);
     \Session::flash('flash_message','successfully saved.');
     return redirect()->back();
}

Problem is i have a one page theme so i redirect same page after contact us details fill. But contact details here stay , not blank....what is it solution?

via Chebli Mohamed