Cases Closed and NOT Resolved

What further complicates OnStar/GM support is multiple support platforms and email addresses for technical support.  ie. socialmedia@gm.com is used for this web site and mobile app.  apps@gm.com is also used for the mobile app (ie. myChevrolet).  executiveescalations@onstar.com if your support issues are transferred to this department.  There is also their Connection Center Team @ (877) 558-8352.  I have 4 open cases.  I send emails to executiveescalations@onstar.com and app@gm.com every other day stating what still does not work and NOT to close the case until resolved.  They state I would get a call in 5 days for update.  I have received a call on just one of my cases.  Also, this website may or may not reply to your posts.  Also, I just had an issue resolved, but I only know it was fixed by uninstalling the myChevrolet app and reinstalling.  I got NO call from any support group that it was fixed.