Intershoot are normally good. perhaps they have been very busy or did not recieve your e-mail. I would start by re-sending your e-mail.
However, i once posted a Dslr camera to Italy. The uk post office got the camera to italy in 2 days. the italian post office took another 16 days to deliver it!
So i would also question if it is on the way and stuck with the italian piost office / courier firms?