I wonder if he/she was drunk and maybe didn't even notice. Still, it's just not right that someone would damage your property and not give you any contact numbers to get it sorted with them. It was either that they were drunk and just didn't notice which is bad enough, or they knew all too well that they'd damaged your car and did a runner which is pretty dishonest. In fact, it's really dishonest. Another possibility is that they weren't even insured.
I had my first bump a week ago on Sunday. My fault, completely - I was paying attention to something else happening on the road and couldn't stop in time. There was no visible damage (I was going about 2-3mph and skidding to a halt) but I gave my details anyway. It never even crossed my mind to lie or run away. I just couldn't do it. I'd feel really guilty. I don't know how other people can.
Gimps. The lot of them. Uninsured drivers, joyriders, drunk drivers, generally dishonest drivers...
Rant over! It's yourself who should be on a rant, not me!
How and when will you get that sorted?