Engen @ Petervale Retail Centre - Service is absolute garbage

Service is absolute garbage, I went to the Engen at Petervale Retail Centre to fill my tank on Saturday morning, the person who "helped" me over filled my car and spilled petrol everywhere, manager came through not only unwilling to do anything about it and still to argue it was my car that had an airlock and pushed all the petrol out? FYI - I drive a Megane RS 265, tank capacity 60L, before I came to the petrol station I still had 1&1/2 bar of petrol in my car, asking for "auto stop" - my bill came up to 57,27L - R928.35? Manger was not willing to fix any problem, walked away before solving anything, unhelpfu, bad attitude and I had to pay for their staff's mistake.