If you have used Inbox Repair Tool scanpst.exe and still getting problems that mean your .pst file is severely corrupted. There are many third party tools available which recover the data of .pst file completely, you may try the demo version of any following tool to find the solution.

I will suggest you the following tools:-

- Stellar Phoenix Outlook PST Recovery http://www.mannatsoftware.com/stellar-phoenix-outlook-pst-recovery.html
-Outlook PST Repair http://www.recoverfilesdata.com/outlook-pst-repair.html
-Outlook Emails Recovery http://www.outlookemails.recoverydeletedfiles.com/