Well...it was actually pretty easy, but i found another way...
At first i was drilling like crazy trying to get that bottom part out, had to let cool down couple of times

, but then i tried drilling on the lock side, i could clearly see the screw inside, so i cut it in half and pushed it out with the screwdriver...
here's results:
the big hole on the bottom is not necessary, all you need is to make a cut in the middle of the lock and a hole right under the cut, the whole screw comes out. The funny part is that its still locked, but now it should be easy
Thanks!