Accident damage with hit-and-run, what do you do?

Hello dear community 🙂 I was called to work yesterday to my car. There was already the police and examined my car. Someone had “shaving” my astra along the driver’s side and then removed from the scene of the accident. However, since there was a witness, he was able to inform the police as well as give a description of the car. As far as so good. The police then handed me the damage number and shared with that the causer is now visited, the name I did not answer the witness. They didn’t have to drive far, they found the car parked 75m further on the main road. The police could very quickly meet a clear noise with the tracks on the car, which was it. However, there was nothing to see from the driver far and wide. He got a note to the disc and that was it then. Today by means of the plate his verse called.. This told me quite soberly, that as long as not her seller as the causer clearly I would be well advised to get the name of the witness out. Otherwise, the procedure would take up to half a year before they even get information from the police. However, they would ask their expert to contact me to assess the damage. Question: Has anyone had the same experience? Does such statements actually vote? Would I be well advised to take a lawyer on the matter? Ig Zfanatic