Kia Alberton dishonesty

Purchase vehicle 8 weeks ago, certified used vehicle, day i got home with vehicle turn out it has a leak. Told them it turn out there is warranty claim that was unattended on this leak. 4 weeks later vehicle returned with no leak but vibration. 2nd issue, I have been begging for vehicle document with no luck, paid them to register the car. I bought vehicle for business now I am loosing that business. Very heartbroken. Unfortunately I just read reviews now about the dealers. It bad news.