What should you do if you don't hear anything back from editor after a whole year from first submission?
If the editor isn't responding, it's time to escalate. The journal's web page should give contact info for an editor-in-chief and/or a managing editor. Contact one or both of them and let them know that you would like an update on the status of your paper, but cannot get a response from the handling editor (include dates of submission, dates you sent emails, etc). They should    take care of the situation.