VoxATC not have any control about terrain when vector you on final, so the only way to avoid crash on the montain on final vector, is to avoid the VoxAtc instructions.
When he assign you the runway, just ask a full ILS approach with the exact following phraseology:
N1151D request full ils runway 09 approach (of course you need to change the red parts with your callsign and the correct runway)
Voxatc will let you fly the STAR and will ask you to report when stable on final.
Personally I use everytime this method and all run smoothly.
I Hope in the future relase VoxAtc will give the correct altitude based on the terrain level as a real ATC.