Gauge not moving after petrol pumped

Topped up some fuel at Engen Florida Goldman street, it's not the first but you don't get what you pay for at their pumps. It's not the first time but the amount of fuel that gets pumped into the tank and what shows on the pump does not add up. I payed R150 Number never moved was told to drive out and come back still nothing when I want my money they refuse was given slip to come see the manager Someone needs to do a calibration test at those pumps. I would not recommend this garage and the staff very rude when asked about these matter he told us to come tomorrow to their boss as they can’t help us now I would like the respond with immediate effect and my money back