Mileage and service book faked!

Hello, last Thursday I bought an Audi A4 built in 2009 quattro. Checkbook maintained with 129,000 km. Now I call yesterday at the Audi dealer who carried out the inspections to find out what was done during the last inspection. Yes, the good man told me that the car was never with him. The mileage would also be there – hold on to just under 360,000 km. The car was always maintained in another Audi workshop, all very orderly h and in December a large inspection was carried out again, where many new parts were installed, which was also very expensive. Everything nice and good, only the mileage is just 3 times as high. The car is very neat and clean, runs also quiet and good (3.0 TDI tiptronic) Yesterday I was already with the police, the name of the seller and the address is not correct. I got the vehicle with short-term identification marks. we had met at a gas station, the recordings are unfortunately already overplayed. Did someone ever have such a case? How did you go about it, what can you do and how are the chances of success to get his money back at least partially? How long should such a well-kept car still be able to run? Thank you very much. LG Bella