What happened to customer service?

I purchased a car at audi menlyn, and was contacted regularly upon enquiry. I was led to pay a holding deposit due to the high demand of the vehicle and also misled on the specs and model. Once the deposit was paid and sale was finalized I was left to sort out all the admin myself, and received an empty fuel tank after paying am admin fee for services and being promised a full tank and valet. After complaining I was referred to a manager who told me why my complaints were invalid and refused to admit any wrong doing or apologise for any inconvenience. The arrogance and lack of professionalism of the salesman and manager was disappointing.