As per my experience:
1. Call that guy, and both together visit nearest police station with your rides ASAP.
2. Police will inspect both vehicles and issue you a report. You will also receive an SMS to visit that guy's insurance company.
3. Visit his insurance company with police report. They will open a claim and give required documents to you.
4. Take those documents to your car agency's workshop and they shouldn't charge you even a single penny. It should be FREE of cost repair for you.