I'll rather travel 20km extra than fill up there again

I'm deeply disappointed at the *****ed service that I recieved from this Engen service station as they willing swidling their client's of their money when you go in for fill up.This was all instagated be the female attendent who 2 days I had indicted to her that I was in for my regular fill up of R450 of 95unleaded petrol and had clearly vocalized the amount needed.After a slight moment after pretending to have filled my tank accordingly I noted that my petrol gauge meter had not changed and made it clear to her that they may have made a error of some sort because there was no change in the gauge indicate.Only For her to state that"It may have been a issue with my car gauge meter problably"Next moment she hands me the card machine with an amount of "R150" which I asked her "why is the amount 150 when I told you I'm looking for 450" she just said she thought it was 150 instead of R450 which she took my money and I told her I believe that she's wrong about the gauge meter because I'll prove it by heading to next service station and do the fill up there-she said it's fine"if there's a issue I should return back to dispute this".Being adament that I'm in the one in the wrong without taking no accountabilty of the errors instead.Since I was in a hurry about needed to commute I wasn't keen on fighting with her but noted to her that I'll take my car into another garage and get a fill up there.I went there and as noted my fill-up was a accordingly with the indicated amount of R450 petrol gauging

I went back to them today to show proof (to the manager and attendent)of the change in the gauge amount from my car because they were stating it to be a issue with my gauge for them to dismiss it as if that my car would'nt even show with the fill up of R150 of 95unleaded any changes in the gauge even though I had proven they false claim.I'm very disgusted with the service and problably will never fill up there again(even if I'm a 1km away from them)I'd rather drive an extra 2km to fill somewhere else than to deal with ******.