<section id="calltoaction" class="calltoaction ">
<div class="blacklayer"></div>
<div class="col-md-12">
<h2>Header title</h2>
Test text

</div>
<div class="col-md-12 text-center"><a class="btn btn-danger btn-lg btn-primary" href="#">Download</a></div>
</section>

.calltoaction {
  background-position: unset !important;
    position: absolute;
    left: 0;
    right 0;
        background-image: url(http://roguelevels.com/wp-content/uploads/2018/04/DSC6507-683x1024.jpg);
      background-size: cover;
    padding: 80px 0 90px 0;
}

.row {
    margin-right: -15px;
    margin-left: -15px;
}