Sasol review: being robbed

I went to Sasol this morning to pour R100.00 petrol. The petrol attended poured then the petrol cut on R14.00. He said the petrol might be finished on that specific pump. He then called the supervisor (Mr Mashapa) who then used a key to unlock the pumps. It was written E-95 or something. He reset it and the attendant pour R86.00. I left for work. On my way to work te kilos remaining on my car only increased with 2km. I thought maybe it will increase. I then arrived at work my petrol has still not increased. I'm certain that when i poured petrol only the R14.00 was poured. The R86.00 was not poured. I have never experienced such in my entire life where i had to complain about a garage. The supervisor from the garage told me that on their side it shows that it went off. I wouldn't take so much time to complain about such. I want my petrol back as it seems like i paid R100.00 for R14.00 petrol.

Please assist urgently.