I was involved in an car accident with the other driver cutting me off. My left front bumper hit their right back fender

And there back right bumper when they did a quick stop. They lied and move the evidence before the officer came on seen. So the officer Said no witness nor cameras conflicting story, said we both was at folk.let the insurance work it out.my car had minor scratch and dents. But I suffered neck injury going 30 mph when they cut me off that was a sudden inpack didn't have time to put on brake. Now my insurance Company refused to pay for my injuries. We both have the same insurance Company. Are there anything I can do now to get medical treatment. Without having to use my medical insurance.