Many ways to recover a corrupt Excel file, try one of the methods below.
- Repair Method
- HTML Method
- Copy data method
- XML method(Excel 2003)
- Other Possibilities
For more info about these methods see this:http://www.wikihow.com/Recover-a-Corrupt-Excel-File
If these methods do not work for you then use a third party solution like SysTools Excel recovery tool.