Oh how I know this horrid feeling so-so very well. My 24-70L got broken last week, I just got the estimate today but I don't believe them, seems to cheap. I don't think they fully looked it over at Canon well enough. My fear is the lens will return still not right.
Don't worry the feeling of wanting do die goes away in a good 4-5 days. 
It's better that you never got to use it, I got to use mine now I loose all motivation to use my other lenses...





