I tried TestDisk but it didnt work ;< .
But with OnTrack Easyrecovery and I actually managed to get 24.000~ pictures out of the formatted partition. Too bad every single picture was damaged and on the best cases, only half of the picture was visible, rest blurred/black/gray.
Guess I'll just let the pictures just go and submit to beating from the owner of the PC
Thank you for your replies tho.