The first thing to do is stop working on the disk. Mount it as a secondary drive and then perform a recovery using disk-recovery tools. A lot of the tools in the web are available for purchase, though you might find a freeware. You may take a look here:
Thanks guys. Trying GetDataBack now. I had to go back to step 1. It has been 2 days already, ang parang di na nagrespond ung application. Ganon ba talaga?