Problem In Decrypting Bitlocker

I was using bitlocker in my local disk e it was working fine. But I wanted to remove the bitlocker encryption but as the decryption was going on decryption stopped n till now the hardisk is unavailable
When I click on that hard disk it shows error
How to recover my data?

Windows 7 includes three command-line tools that you can use when working with BitLocker. These tools can be found in the %systemdrive%\Windows\System32 folder.

Hope it helps