general problems of the 2009 Kia Motor Spectra

My car seems like someone entered something in my gas tank while I may been in the store.

My 2009 kia Spectra had approximately 23,000 miles on it when I purchased it from a kia dealer in October 2017. Two days after purchasing my kia, I returned to the same dealership and reported that I noticed the car was idling to high after using the air conditioner or after driving on the freeway. The dealership did nothing and did not assume any responsibility for any repairs. Fast forward to today, the problem became worse and my vehicle began to launch forward after I stopped at a stop sign or traffic light. When removing my foot off the gas pedal, the car increases in speed instead of decreasing while in motion. I was told by my mechanic that the issue was the idle air control valve which cost $105. 00 for diagnostic testing and $256. 30 for parts and labor.

This car is trying to kill me. I turn on my car, feet aren't on the pedals, my rpms rev and sputter up to 4,000+ without me doing anything. Sometimes it will launch me a bit when I'm trying to back out of a parking spot. Sometimes I'll be at a stop sign or a red light, completely stopped, foot on the brake, hard. Cross-traffic flowing. Suddenly my engine revvs and my car lunges forward. Wtf kia? I've taken it to kia once and they told me its a transmission problem that's going to cost more than the car is even worth and more money than I have to spend. So now what? I'm going to pay for a life endangering mechanical problem that likely costs dollars and minutes to fix because the mechanic thinks its a transmission problem? hopefully something is resolved before this car wrecks itself.