Journal Editor does not respond about status of paper ~1 year
Getting no response to status inquiries at all is not normal. Make sure you're contacting the right editor. Unless the journal is dead (i.e. no new papers accepted and published), someone out there is organizing peer review. That someone should be able to answer your question. However if you're writing to the wrong email address which might not even work anymore, then your email might not even be getting read.


See if you can reach the journal office (i.e. Springer's employees). I don't know what journal you're referring to, but e.g., for AIDS Research and Therapy they say at the bottom "General enquiries: info@biomedcentral.com". Try writing there.
See if you can reach the editor-in-chief.
If you've already tried and the editor-in-chief isn't responding: search for him/her via Google, see if their email address has changed.
If you've confirmed that the email address is correct: try sending from a different email address, in case your current email address is blacklisted for whatever reason.
Failing all of the above, try contacting a different member of the editorial board.