Help Car Accident and Insurance issue

Another car hit my car and to his company he is claiming that I hit his. His company sent me mail asking to contact my insurance and also asked me If I don't agree then send the documents. They mailed me the required documents as well. I already sent the docs claiming that He did the incident and I am supposed to get support with repair cost. I only have third party insurance. What's going to happen next? Do I need a lawyer? need experienced opinions plz.