At present we do not have a UK phone number for Dropbox. However, you can contact their support department about their online file storage by logging in to your Dropbox account here: https://www.dropbox.com/support
Dropbox’s London offices also take enquiries from business and personal file storing customers: Dropbox, 2 Riding House Street, London, UK.
Dropbox is an online storage company which hosts its user’s files on their server. Having pioneered cloud storage technology, Dropbox customer services presently answer ever-increasing numbers of enquiries via their help and support forums.