AutoNation Hyundai O'Hare

Brought my car in as service light on and riding rough on 5/22. Told the engine block was cracked and would cost $12,000 to fix. I said it was under warranty but they challenged that. I went in thinking I had to buy a new car. After talking and looking at my paperwork they agreed it was under warranty and said they would fix it and provide a loaner. I am a single senior woman with no other means of transportation. I asked about renting a car and they all said don't do that we will get a loaner. They have had my car for over two weeks now. I contacted Hyundai corp. Headquarters and they gave me a case number and investigator. He has done nothing. Everyone keeps making excuses for this dealer ship. They are remodeling and are backed up. They should have planned better. I have been told more than once that I'm not their only customer. So much for customer service. I burned a whole week of vacation time waiting for a loaner. Am now renting a car and have spent $700 +. I guess I am naive for believing all the promises this dealer has made. I bought the Hyundai for it's warranty in the first place but will never purchase another. I would never recommend this dealership. Unfortunately if they won't fix my car I am stuck with buying another car from them as they have me over a barrel at this point. It's really disheartening for me as a woman and a senior with no one to stand up for me to have to deal with this. They were all so nice to my face when I came in but have treated me like crap since. I don't know where to turn at this point.