Petrol overflow

My sons friend went to throw petrol in last week sometime by Shell in Brackenfell by the PnP Hypermarket. He threw in a full tank and the petrol attendant went and threw petrol in over the limit. So we all know that when the tank is full the pump will make a jerking motion saying its full because of the sensors. So this petrol attendant when and took the pump out after it jerked and then he went on to through more petrol in. My sons friend drove quite a far distance after that and when he stopped he saw the petrol was running out of tank down the body of the car. So he lost hell knows how much petrol THAT HE HAD TO PAY FOR which is now lost. How many other motorists is this not also happening to. Not only is this petrol attendant giving this company a bad name but this child has lost money and petrol. Who is going to pay for this? damn well no one. Unfortunately my sons friend didnt keep the slip nor does he know the name of the attendent. so its a loss for him. so people no matter where you throw petrol in check that you get your money worth and make sure you keep your slip