Recovering an account without the keys is near impossible, with the only way being brute force, but with the 32 character key provided to you by steemconnect, good luck brute forcing your way through that.
Account recovery is quite easy if you have one of the old passwords of the account, and the key to the recovery account but without both of those, it can't be done.
Steemconnect regenerates a new key every time you go onto their create page so there is no way to tell what it was.
I'm sorry to have to tell you this, but that account is most likely gone forever unless you are feeling lucky with a bruteforce.