The section top-header in new Matrix Themes with draggable options has been removed as you now have an option to add any module directly under or above the logo.
For those who prefer "the retro" style, please check the below tutorial about how to add another section on the top of the header
Go to design> custom template> HTML tab and place the new section just BEFORE the header:
...
<div class="hs-top-header bg-dark">
<div class="inner cc-clearover no-padding">
<div class="right-align mobile-left add-top-10 add-btm-10 size-12 color-white link-white">
<div class="fa fa-mobile">
</div>
 (+46) 432‑582-02,  
<div class="fa fa-envelope add-left-10">
</div>
 <a href="mailto:office@mail.se">  office@mail.se</a>
</div>
<!-- end hs-right -->
</div>
<!-- end inner -->
</div>
<!-- end hs-top-header -->
<div class="c">
</div>
<div class="hs-header cc-clearover">
...