Customisable list above header

Hi, I’m relatively new to this and have just taken over the continual development of my website.

My website has all my contact details and icons for social media sites at the top of each of page on the website.
I am trying to change these but unable to find anywhere in WordPress where I can alter these details.
The obvious section is headers & footers but it doesn’t seem to be there.
Any assistance would be greatly appreciated.

The page I need help with: [log in to see the link]