What probably happened was that there was a hard-link between the Home directory and 'C drive', so when you change one you change the other. If its not in the trash and has been deleted as if by "$ rm -r -f Home", then you're pretty much screwed and it can only possibly be retrieved by getting the info using the file allocation table (thats actually a windows term, whatever its equivalent is in linux). This is usually a highly specialised thing, and may not even be possible. But since this was at the office, I'm sure theres probably important stuff worth forking cash out for.
Of course another way would be to load your backup (lol, like people make backups these days)