Sorry to hear about that. At least they did not ram the car hard and knock you over or worse, and you have evidence.
Earlier this year our Freelander was parked in an Exeter car ark and a driver rammed it, got out her car, looked at the damage, drove off and parked away from it and hit another car in the process. Luckily a member of the public reported it to the police with drivers reg. it took me 3 months, 6 phone calls and the police threatening prosecution on 2 counts before the driver admitted liability.