you poor poor girl big hugs.
In terms of your scar may I recommend Bio Oil, and if you have the cash the Creme de la Mer serum is amazing. If not just ask to use some every time you go past their counter. Car crash victims use it.
There was an excellent thread about scar patches, have tried searching for you, but it also includes the scar part of scared, so there is plenty of chat on that instead of what you're searching for.
Get the police to trace his number, sketch him and also see if you can find a pic on cctv near your area or any reg plates, all helps
xxxxxx