@kt84 wrote:
my account (and my email address) has been hacked and I really need my CV.
You can try contacting Support but you typically need access to your email address in order to gain access to your Dropbox account. Without your email, there's no other way to verify your account.
I'd suggest contacting your mail provider first, asking them for help recovering your email address. Once you have that you can contact Dropbox Support for help gaining access to your account.