Use the email reset or password reset page to continue.
So if that doesn’t work for you? Or this:.
If you do not have access to the email above, please contact us to verify your identity and update your account.
I assume the contact form linked in the text sniped above didn’t work out too?
Then you’re on the right track here, you just missed to ping @accounts because this is account related (see also).
Now just wait until you get contacted by a person from the accounts team.
PS: I hope your feedback allows Roon Labs to improve their offered procedures that didn’t work for you.