In April, some idiot in a Corsa undertook me on the M6 and cut back in, hitting my front end. My car has a fair bit of damage but his came out with a small dent. I went through the usual route with insurance and waited, I called my insurance the other day and they've said that they've closed the case since the other driver hasnt claimed off my insurance. This has left me in a bit of a pickle, my insurance company are no longer helping me sort my car out, is this legal? and any good idea what to do next? Ive tried contacting his insurance but haven't manged to get through yet. I'm only third party on the car so my insurance wont fix it.