Yes, I am able to recover my files. I haven't checked yet whether all are recovered or not but yes a few I have checked are recovered. As there are many many files which are recovered via that tool/command I need to grep some text pattern in those files and see which are mine. The files are recovered with different names (may be generated by system).
I got the solution from a different forum and the command is photorec

 sudo photorec

This will open a text based window. I followed the instructions and yes it's superb.