O2 Sensor problems of the 2007 Dodge Caliber

I purchased this 2007 Dodge Caliber rt awd in Dec of 2012. The dealership grand Chrysler Dodge Jeep in lowell, michigan on main st, reported to me the consumer, before purchase, at my request, a vehicle history stating 1 owner vehicle with no accidents. Thank god I did get the warranty because less than 14 days fresh off the lot, the vehicle loss all power and barely driveable, the car, while I was driving it, on the highway around 55 to 60 mph, lost speed real quickly and and could barely drive it to get it off the road. The vehicle coded at service shop 02 censors and catillatic convertor, the vehicle was at the dealer service dept and back and forth from my home for more than a month, until finally the Caliber had to be seen by a service representative from Chrysler/Dodge and now pushing 2 months without the vehicle not only did the 02 sensors and catillatic convertor had to be replaced, but the computer too. Got the vehicle back drove it 3 months and the vehicle had grinding in the front end,electrical seat heating and blinkers systems were malfunctioning, each tim the engine light came on and the vehicle remained sluggish and unsafe to drive, but the dealership lacked concern and made me drive it in the unsafe condition from west olive michigan to lowell. Oct 2014 the vehicle almost caused me to get into a serious rear end accident. I was driving 60mph on the highway and it went from 60 mph to 10 mph just like that cars on the highway swirved to miss hitting me and I was almost rear ended. The car completely stalled. A gentleman stopped to help me push it off the road. . Vehicle and I sat for alomost an hour waiting for tow service. Service dept. Coded the vehicle with a crank shaft censor problem and a recall as well for the front end cross member rusts out and cause bad settling and excessive tire pressure from the errosion not supporting the sub frame.