We took the car to the dealership for a simple oil change. Initially we worked with Gordon Hummel, whom immediately took advantage of our lack of knowledge on cars and began upselling what we now know was unnecessary services at the time, such as a wheel alignment, tire balancing, and tire rotation. Majority of the work done that day dealt with the tires. When the car was returned from the dealership it had damage on the vehicle that was not there prior to bringing it to the dealership. They made a slash on the tire, along with a groove in the rim, and placed it on the front driver side which is the most dangerous location for it. Not only did they damge the vehicle but they left dirt and oil handprints all over the interior. They claim the damage to the tire and rim were already there, yet the damage wasn't reported on the initial inspection/paperwork nor did anyone notify us of any damage prior to working on the vehicle. They tried to claim they had sent an email that notified us of this damage but that email was never received nor would they show us the email. We then stressed the fact that sending an email after the fact that they had already worked on the car is completely irrelevant to the situation at hand even if they had sent one, which again was never received. When we arrived to pick up the car, shortly before closing, Mr. Hummel stated "by the way did you know you have a slash on your tire?", which we then responded "No, thats brand new". He then showed us the tire and we assured him that was new to us. Our appointment was at 3pm and the car was returned around closing time, which is 6pm for the service department, leaving us no time to further dispute the issue. When I returned to further dispute the issue, I spoke with the service manager named Bill. We walked around the vehicle and I pointed out the damage done by the technicians. He immediately denied responsibility and reverted the blame back by saying the damage was caused by running something over while driving. I explained to him that the amount of force it would require to cause the damage that was done to the wheel and rim would have also caused some type of damage elsewhere on the tire or car itself. Yet there are absolutely no other signs of damage from any kind of accident anywhere else on or around the tire. Just the clean slice in the tire and gash in the rim. Bills reply was "You can't prove we did it and you can't prove you didn't do it". Appalled by the unprofessionalism, I then proceeded to ask for them to pull up the cameras for proof that it was not there when we dropped the car off but he dismissed my request stating that they did not have any cameras, which we later found out to be a lie. I also requested the inside of the car be cleaned, along with the outside, but that wasn't even done properly so I had to return again because there were still dirty handprints throughout the car. The car was once again returned filthy so I scrubbed it clean myself. Another attempt was made to resolve this issue by talking to the GM, Steve Ignowski. He proceeded to dismiss every claim made. It was then that we found out that they in fact do have cameras but claimed they were down at the time. Steve Ignowski also behaved as if he had no authority over the service department meanwhile it was corporate whom told us he does. So if the GM doesn't have authority than who does? They were completely unprofessional, making statements such as "take us to court and you'll lose". These are suppose to be trained professionals whom we are expected to trust our cars and potentially our lives with. One would think they would know better than to work on a tire that they claimed to already be damaged and then to make matters worse move the "already damaged tire" to the front drivers side of the car knowing it is the most dangerous location for the tire to be placed. Unfortunately this has not been our first issue with Hyundai. Hyundai's poor customer service is unacceptable and definitely has veered us away from purchasing from them ever again. It does not matter how much they improve their vehicles if they do not improve their customer service as well.