Because your phrase is not an account recovery tool - it is a password hash recovery tool. It does not tell you your password, but it does tell you what the hash of your password is. It does not link to any account or wallet, and so if you do not have the wallet ID or associated email address, then even decoding your phrase to your password hash would be useless to you.

As pooya87 has said, they are not going to release a tool which requires access to their database. Even if you contact them directly with your phrases, I doubt very much they will scan their entire database for a match and then just hand over control of the wallet to you without any further confirmation (such as a wallet ID or email address which you cannot provide). It would be like me emailing Coinbase and saying "If there's an account with the password xxxxxx then it's definitely mine, can you hand it over please?"