Well firstly it's hard for me to feel bad for you since, you haven't even mentioned where or how you found this job and you claim they have your info yet fail to explain why ? Also you downloaded a file from a website without a domain, then you get a warning from your browser then you warned not to download the file but you still went ahead and did it anyway. I don't think anyone can help you since you not explaining anything at all.
I did not know how they know my personal information. and I did not get any warning when I download or open files.
probably you post your personal information on your account, maybe facebook account or the others.
I wonder why did you just download and open the file without concerning about hackers. I mean, you have high amount of BTC, didn't you try to keep them save? Make high security, don't download or open files you don't know exactly.
next time I hope you will be more careful. sorry for your loss.