Do everything possible to make sure you remember the email address you used along with its login password or else you Bitcoin is lost forever. I understand why the support won't help you recover the account. The main reason is all a bought security.
Imagine if a stranger knew wallet ID and password but had no access to your email address. The would bypass the 2FA by requesting for support to reset your account to a new email address they have control over.
Theoretically, I guess the support staff could at least send a mail to the 2fa mail that's currently being used to secure this account.
If they get a reply, they can tell the owner of said mail that someone has his blockchain credentials. If they don't get a reply, it might give a small indication the address is indeed lost... However, this would only be an indication: the email might have been hacked so it's no longer the original owner replying, or the real owner might think it's a phishing mail that was sent by the support staff..
But a mail like this, together with some other info might be enough to honour OP's request (things like login times, ip's, os, language,...)
But blockchain support isn't known to put any extra effort into helping people...