Who is at fault, the track driver on the main lane that intentionally accelerated, or the car on the merging lane?

during a traffic h on highway: I was driving on the left lane (A) when I observed that the lane is merging into the right lane (B). I put my left signal on and was looking for the best moment to merge into lane B. It was a track on lane B that had enough room in front of it, so I accelerated and starting merging into lane B, in front of the track. That's when the track started accelerating and I pulled back into lane A to avoid it from crashing into my car. I pulled on the right as much as I could, but there was nowhere to pull anymore because of the protection wall on the right of lane A and the lane A coming to its end. He scratched my car mainly the front left door, folding the mirror outward. He never stopped and I started following him. I called police and they tried sending someone but they gave up. I am not sure of where exactly I was when he hit me (on lane A, or I have entered the lane B partially). I managed to follow and catch him. He denies seeing me or feeling the impact