Car bought by Private

Hello I bought a car from Private, in the contract there is nothing of a frontal accident (orally) , contract signed, after a week the seller comes and brought me a new contract with the hint that it is a hobby vehicle and has a frontal damage.(Buy price 5000 Euro) To sign stupidly signed-purchase gassed meanwhile has russian that the car has another accident (driver side),with a considerable damage,which also unsa Is that not a fraudulent deception?Do I have chances of getting out of the contract or is that even fraud?