Frightening experience at Puma Goedemoed

Had a horrible experience at the puma Goedemoed Petrol station at 6pm at night. I was alone with my 7 year old daughter in the car and quickly stopped on my way out to put petrol in to get me to her school the next day. A petrol attendant came to assist and I asked him while seated in my car for R100 unleaded. I then proceeded to talk to my daughter and when I looked to see where he was I noticed he had put R700 in my car! I asked him why he had put R700 when I asked for R100 as he told me I said R700. I told him to get the manager as I am not paying for it and don't have R700 on my card currently with me and to remove the petrol from my car. The manager came to my window along with a different petrol attendant who started screaming at me viciously telling me he heard me ask for R700 even though he was nowhere near my car at the time. I then realized it was clear that something underhanded was going on. The manager then got the owner on the line who threatened me to be careful of his petrol attendants because they will take my car registration and find out where I live and rip me apart!! It's clear that this was not done by error but planned by the petrol station in order to get more money out of their customers and I was targeted as a mom and daughter alone in the car. There was no sort of apology but only pointing fingers and attacking me immediately. My 7 year old daughter was left scared and traumatized from this experience. Nomatter how desperate I am for petrol I will rather drive past Puma Goedemoed and go to Engen or Caltex instead where I know everything is above board!