How to request retraction of a published paper when contacting the editors and publishers doesn't work?
If you have tried the journal/publisher's complaint process without success, and you believe that the journal editors are not handling the matter according to commonly accepted publication ethics standards, you can contact COPE, the Committee on Publication Ethics. All Elsevier journals are members of COPE.


  If a reader or an author has concerns about a member editor, journal or publisher which they wish to raise to the attention of COPE, they should email  the COPE Membership Assistant and supply the following information:
  
  
  A summary of the concerns in 500 words—this will be shared with the editor and/or publisher and thus the summary should be as clear as possible and provided in a polite tone.
  An outline of the points within the COPE Code of Conduct which are relevant to the concerns.
  


Source: COPE: Contact Us 

This flowchart explains how COPE handles complaints about member journals.