BAD EXPERIENCE and SERVICE

This morning i arrived at the pertrol station at 10 to 7am where the attendant( Brian) assisted me I asked for R200 and he started doing the Windows, and then I turned around and looked saw it was over R350.00 I then screamt and he walked around stopped atR400.00. I then told him I said R200.00 he rep**** no with a smile I asked for the manager who was not there at the time and rather supervisor he didn't mentioned his name and said then it was mis communication by the two I explained why would I ask for R400.00 when I know the balance is my account was R250.00 I offered to even show my statement..instead the supervisor asked what the agreement would be I then said im willing to pay the extra R100.00 and the attendant the other R100.00 as we both at fault...the attendant forced I was not focused how can that be when im telling someone the amount and he does his own thing..I informed I need to attend a meeting dragging his feet he tells me the machine first needs to charge before swipping I end up jumping out the car and swiping inside....everyone is so calm about it as I informed I do not have that kind of money to pay them...Im disgusted in the service the supervisor never assisted in any way regarding customer service he didn't reprimand the attendant at all and just took it I have to pay the balance.. Im upset and will never attend that garage AGAIN!...when it comes to customers they turn everything around and make you feel you were not focused.....disgusted