Shell fool everyone with petrol

We were at shell garage in kraaifontein on Saturday and bought R150 petrol. We drove 70km with that petrol and there were no petrol left in the car, the light were flickering! On Sunday we bought R150 again at another garage same price. We drove 80km and half of the petrol did not even drop! They stole our money and I will make sure everyone knows about this!!!