I feel your pain. Could just be me of course, heavily influenced by now being of senior years, but I'm of the impression that driving standards have really plummeted over recent times. There was also a time when people would go overboard with being apologetic, so much so that insurance companies were obliged to enter 'do not admit liability' into their policies. Now though, the culprit driving on as if nothing had happened, appears to be all the fashion.
Hope all works out well regarding the insurance and repairs etc and that they catch the offender and throw the book at him/her.