Bad Customer Service!!

I received the worst service from Hyundai The Glen, I bought a i20 1.4 Fluid Demo car, the service was just appaling and disgusting to say the least! I was told that the car would have smash and grab but when I got home, I noticed that it didn't. I called and they said I can bring it the next morning of which I did, but then got a call later in the day that they will not put smash and grab on the car but I was charged for it. I sent a email to complain, but was told to contact the Dealership Principal, I tried calling his line went unanswered. I did not get any apology for the incident. I was advised to collect the car the following day and confirmed in the morning around 08:30 on 10 April, then I got a call at around 11 to say that the car will be ready at 13:00 but I had arranged to collect it at 12:00. I understood and agreed. When I got there at 13:00, the car was still not ready and the salesman said that he will go and see if it's ready. He disappeared for more than 30 min and when I went out to investigate, he was in a meeting. No one informed me of such, He bought the car and it was wet and there were papers lying thrown inside!! I left with it like that!!