Carelessness

Was at the garage for the diesel but they pour in a petrol then they pour again a diesel saying that it will be diluted,they told me if something happens I must come back so the car started to release a smoke then a sound then it lost power,i took it back there they put it at the garage I was called once saying that they will send someone to come and look at my car till now,m using taxis now no body cares after all the damage that they did to me and my car