Default [Q] Trying to recover formatted files in HTC ONE

I accidentally formatted the phone after unlocking the bootloader, files in it were all gone I tried a android data recovering software called Dr.fone, however it only recovered some useless data like app icons, whatsapp profile pics, facebook profile pics ect. Does this mean that all my photos taken were being overwritten and is gone forever?? Is there still a chance of getting them back? Please help.... thx