if I could access that I wouldnt need this
I could have just used forgotten password.
I am not saying that you are lying. I am just trying to explain why they are probably not responding to your email. While your issue might be genuine, it can also be a security loophole with which hackers use to access accounts of other unsuspecting users
If you have even tried to reset an exchange account whose 2FA you have lost access to, you will understand what I mean.
Doesn't signing message count as something
I have even signed two messages with two of my addresses.
Signing a message is just one of the requirements, but the most important one is access to the email address
Cases are handled mostly in first come, first serve. So your appeal is currently on the queue, might take days, weeks or even months depending on the number of cases ahead of yours.
Recovery cases are so few lately. If his case was already in queue, we would already be seeing an entry in the seclog.