Adding Icons to Header

I need to replace the social icons which come with my theme with my own icons (long and sad story – icon fonts clash with my CDN).

Please can someone tell me where to place my code within the header? I only manage to get a white bar containing the image above the black bar where I want the icons to appear.

This is my code:

<div id="socialicons">
<a href="https://www.facebook.com/photomobilisrael"><img src="http://www.photomobil.co.il/wp-content/uploads/2015/04/thumbsUp-3.png" alt="email icon" /></a>

This is the site.

Thank you,
Deborah