After requesting support for this fatal problem, I have been in contact with a specialized support, but even given all kinds of data and proving that I am the owner of the account, I am not given the option to regain access.
It all starts when I had to format my phone, but I don't have a backup of the validation application for 2FA and I have lost the emergency code.
My account is not compromised, I have not changed my phone or number, I also have an Apple account with the same email account as Dropbox and with 2FA, which has my phone number registered the same and does not allow me to validate either because the codes They are independent.
Now it says that I inevitably have to lose the information that I have in my account.
I had to create a new account to write in this forum.
You enabled a feature that prevents access to the account without specific information, and now you're trying to access the account without that information. If Dropbox allowed that, it would be a complete breakdown of the security.
I understand the security reasons that is why we want to use it, but I do not claim to deactivate it, after having sent personal information about the structure of my folders, including with whom I have shared them, screenshots of my last access and everything related to my authority, data that only I could know, should have the possibility of an access to reconfigure the validation application.
In my case the device has not been lost, I observe when I want to send a notification, but it does not work because it is not linked.