failed to make the customer valued

I brought in my fiance's Audi A1 for a petrol filter replacement at the Boksburg brach and when the car was signed in there was a 8gig memory card on the radio even the service adviser Anslin chetty saw it when signing in the car. when i came the following day to collect the car I realised the memory card has been removed from the car, and when I approached them about the missing item no one knew where the item was. one thing that got to me the most is when the manager Juan, the first thing he said was \we don't take liability for any loss in the cars"";it would have been better. When the manager makes you feel that way it seems as if he is saying to his subordinate its okay to ***** from our customer we will just wave the liability form they signed to their faces. I would raelly expect such treatment from a Joe's garage at some corner NOT from an Audi dealer."""