"The phrases which you have are simply encodings of the hashes of the passwords you used for the wallets. They are a password recovery tool, nothing more. "
exactly, i know that ..but i really cant understand why blockchain.info in they play fair and correctly and dont want scam his first members why the hell dont offer this "tool" , why they dont keep online this account recovery option - in my opinion in my case are for sure thousand of accounts with many thousands of btc on it!
probably because such tool can not be released since it uses their database. for example it may be something like this: you send them the recovery phrase, they hash it or convert it, or whatever then use the result to lookup in their closed database (that can not be revealed) to fetch something like your email address and the login password salted hash. then it could as for more info and send a recovery link to that email.
no "tool" can be released for this. that's why i said their support is the only one that can help you.