AutoNation Dodge Ram Arapahoe

Took the Challenger in because I felt a weird vibration when the car was idling in drive gear. Also wanted the washer fluid checked because for some reason the light came on after hardly ever using it. Dropped the car off on a Friday afternoon and they said they would just need it for a few days. They didn't offer me a vehicle to use while they had my car which turned out to be for a week, and they didn't contact me about status at any time. I called to check and no one knew anything so I gave them the last six of my vin so they could look it up and then they said they would talk to the advisor and get back to me and never did. Only call they initiated was when they called to say it was ready and even then the only thing they mentioned was that they fixed the issue with the washer fluid (turned out to be faulty wiring which they fixed). Had to pry any other info about the other problem out of them, and it's still happening. The report says its normal but I've driven the car lots and the vibrations hadn't ever happened before and they are still happening. Now I'm afraid I'm paying a lot of money for a car that's not as it should be.