Sasol Gas Station in Nuffield Springs

This place is the worst, I have been a client for a long time now on a weekly basis and never supported another gas station, I have a small car which automatically means my tank is small. Every week when I go to fill up my car I tell them it makes petrol bubbles and they need to fill slowly so my request is continuously ignored and I have to keep on paying for petrol they waste for not listening, yesterday I decided to request a supervisor to assist me where he had the cheek to tell me that he has filled up a car like mine with petrol before and it does not make petrol bubbles and secondly even if I go to another petrol station they will do the same... It's not really a competition... I am a regular customer and this is the response I get, eventually he got someone to help me which was also not really eager, he filled up my car to R320 which is the amount my car usually takes to fill up. I was busy in the car with my daughter and did not think to check what he is doing. This morning when I got on the Highway my car did not even reach 20km and 2 bars from my petrol indicator immediately dropped. I got my car checked for any damage if this might have been a petrol leakage but this is not the case at all. I just think I was being taken for an idiot and the possibility of petrol being poured into another container when I'm not looking is great since this have never happened to me and all of the sudden when I asked for assistance that petrol should not be spilled this happens, I will make sure this garage does not get any support from people I know since I have been telling a lot of people this is the only good place to fill up... I will never support this place again and go publicly viral with what happened.