Never to use Sasol Philip Nel Park

On 22 December I filled my car with R300 petrol. My car was almost empty and the gauge moved to half tank. The following day I decided to travel home for xmas. I went back to the same garage and filled my car with another R300. Just when i started my car i realised the petrol gauge moved with just few bars and not even a quarter of the tank. I asked the petrol attendant and he said the gauge will move up as soon as i drive few km. This was surprising because my car's gauge move immediately each time i fill it. I drove around and came back. The gauge was not moving. I asked to see the manager and she didn't help at all as she only showed me the footage of the two days when my car was there to fill up. This happened to me few years back at the same garage and unfortunately i did not report it as i was told the manager is not there. Iam a resident of Philip Nel park and i buy bread and milk there and even fill my car. I don't understand why Iam being ****** as i regarded myself as a regular there. I don't think me and my family will ever buy from Sasol Philip Nel Park again. My money might seem small but in a year it's a lot.