As you said that Scanpst.exe is not working then you have to
use 3rd party software, by which you can recover or view your PST file
I was facing a similar situation few days ago, then while
surfing the net I found SysTools Outlook PST Viewer Software. It helped me to
view my corrupt PST file data without spending a penny. You can also try other available
brands such as Kernel or Stellar software. But personally, I would recommend you
to try SysTools Outlook PST Viewer Software.
In case, you want to retrieve and restore the lost data back
in outlook in PST format then Outlook recovery tool by same company SysTools
can be helpful.