Bad Attitude, Incompetency and breach of promise

i refered my sister to buy a car from Hyundai Springfield and On 2 separate occasions they failed to deliver to promises in time.First it was the delivery of my sister's car from Hyundai Springfield to Johannesburg - they misrepresented to the client that the car will arrive to her with a full tank, to my surprise even their hired Driver did not have the money they claimed he had to fill the car not to mention the undear car-wash, I had to add money from my own pocket to get a decent car wash. I had to call a number of times and my calls were ignored - then on my call to the manager he then managed to contact the guys contracted to deliver the car to sort out the petrol issue very inconvenient.2nd thing I had arranged for my car to be fetched from them on Wednesday.to which the lady did not go to work i believe. then On Friday we spoke and she came with the idea of me fetching my car from their dealership myself on Sunday night and that she will give the security my keys which I agreed. AGAIN Khanyi failed me.she did not bother herself to make a note or leave my keys with the securities,i had to call a friend who is 175km away to bring my spare key at 23:00.dissapointing