Hi. Please add this request to this page, and I'll get to it as soon as I can. Before posting your request, there is one thing you'll need to do in order to be approved (and meet the best practices criteria linked at the top of that page), and that's categorizing these uncategorized pages.
The 3D metallic effect looks great when the image is large like that, but when you shrink it down to the necessary size to use as a new Game of Thrones Wiki logo and look at it on the new page color, the 3D metallic effect is lost. See the example here.
If you feel that a new logo and main page refresh is needed, I encourage you to at least discuss it with QueenBuffy (she put in the request for help), if not discuss it with the whole community, as was done with the new background.
You can find some helpful information at Help:Infobox and on this guide to infoboxes written by Rappy from the Community Support Team. And don't forget about asking for help from other users on the forum.
If an image is not displaying, I would suggest sending a bug report using this page, and give as much as information as possible. That will go directly to the Community Support Team, and someone will respond soon.
One of the main requirements that must be met to be approved for design requests, such as a logo and main page, is that the community must have at least 50 pages, so I'm afraid I can't do this for you. But you might want to ask for help on the forums in the Designing Your Wikia section and see if someone responds.