I can't access my Dropbox Plus account; a one-time code is sent to my old address.

[lerakut]

Hello,
I have the following problem.
My Dropbox Plus account is linked to an email address that no longer exists because it was changed.
When logging in, the code is sent to this old email address, which I can no longer access.
You can bypass this with the code by clicking "Having trouble receiving a code?", but unfortunately, this doesn't work for me.
How can I log in without a code so I can change my email?
Thanks in advance!

[DropsterG]

I sent an answer yesterday and look forward to solve my issue with your help.