Bad customer service, irresponsible consultant Mr Pretorius

Bought a car September last week of November it started leaking petrol. They arranged a tow Truck to fetch the car it's in polokwane vw now and they say it's due to dirty fuel and that should be covered by the customer. The question we asked is fuel circulates so who is to be blames because the dealership also put fuel there is no answer. The car is at polokwane they will start to talk about storage fees I only paid two installments so far and the dealer is saying it's not their problem the car was never empty since it was bought.