If you have a corrupt pst file Microsoft Office has a tool so you can try and repair your corrupt pst file.
SCANPST.exe can be used to try and repair your pst file. There are also many 3rd party tools if SCANPST does not fully repair your file. Before you attempt to repair your file you should make a backup copy. Here is how to find SCANPST.exe
If SCANPST.exe does not exist on your PC run Office Repair and it will de installed.