When you got hacked you can do nothing to make it back to you. Scan the entire files at your computer with the recent antivirus(always update your antivirus software). Avoid to download an application from the net especially from second uploader( if you need to download software, download it from the original source. And for the last question, I dont think there is a cyber police nowadays.
so have altcoin must be careful, because have a big risk