Logo not displaying

Hi, I can't get the logo to appear on dalkeytaxi.ie

I had a guy add the following code to the site to make the logo bigger (he tried it on a cloned site and it worked) but am not sure the code has anything to do with it.

I can provide a log in if you email me.

Using GP Pro 1.3.41 and the GP Child Theme

In Appearance > Simple CSS

.main-navigation .sticky-logo, .main-navigation .sticky-logo img {
height: 104px;
position: absolute;
z-index: 1000000000000000000000 !important;
margin-top: -7px;
width: 121px;
}

.main-navigation .sticky-logo img {
position: relative;
}