Bp Tshepisong *****ing clients

I went to the Tshepisong BP yesterday to put petrol, a petrol Attendant named Sifiso assisted me. I went to put a mere 100 rand the guy decided to take advantage of me and didn't put the petrol at all,then swiped my card. On me driving out my petrol immediately went on reserve, how do you put petrol then it goes empty, I immediately turned back as I was still within the driveway if the garage and requested for the manager on duty and asked how is it possible that I put petrol but petrol goes on reserve, upon investigation from the manager on duty the details of the slip were not even mine, I can't believe at the cost of how expensive the petrol is the attendants are still *****ing clients. The manager suggested they put the petrol and suddenly it went up because it was not put in before. I am extremely very angry at this behavior from this Sifiso guy, I even asked him was it really worth, I had my kids in the car that were tired from school who had to seat there while I had to try figure out all this, howany more people are they *****ing like this, I honestly need feedback from BP and clarity on the staff ethics there.