Desperate help

So as you can tell my blog is all messed up. I don't know what blogger has done but when I went to change my blogs background and all that great stuff it did it just fine. But when I went to try and change my text color of font and all that good stuff I couldn't find where I normally did it. They changed the customize button to design. To say the least I am so annoyed and in my attempts in trying to find it I lost my blog stuff. YAY!!! ugh! and the blog I use to use is now private and I have not access to it now. I can only remember a few things and none of it is working. So if anyone at all knows how to change blog stuff using the HTML please help. Why do people have to change things that work. I liked my blog the way it was maybe it wasn't as hip and cool as others but I liked it. Please help!!!