Ignition Module problems of the 2010 Chevrolet Cobalt

In 2012 I had an incident, my key was stuck in the ignition with the car running. I took it to the dealer, the ignition lock cylinder was removed, and they found the spring hold down plate was off and the spring was out of the cylinder, they replaced the ignition lock cylinder. Then, the recall happened and in Feb of 2015 I had to bring my car in for the product safety recall, they replaced the ignition and start switch. In may or June 2015 I noticed that my car was acting weird, the speedometer was acting erratic jumping from 30 to 60 then back down to 20. It was jumping all over the place even when the car was just idling then it would stall out. I took it in to the dealer the last week of June or the 1st week of July, they changed the module panel and said it was under warranty. I drove my car out of state on July 17th, on the way home it started acting up again, the engine seemed to lose power when getting on the highway, the speedometer was acting all erratic and the car was bucking like it wanted to stall. When I got home I brought it back to the dealer on July 28th, the car was there all day but they said they could not replicate the issue so when I got off work I went up there and the tech took a ride with me, the car acted up and he got to see what it was doing, he mentioned something about a cluster panel to the service manager but said he had to check with gm. On Friday the 31st of 2015 they put in another ignition thinking the other may have been faulty. The tech called me to see how the car was running an hour later, the car was doing the same exact thing. I am taking it in tommorrow Aug 3rd but I'm not sure what will happen. My car has 59,800 miles and I just paid it off on July 31, 2015 it is unsafe to drive. While idling the speedometer jumped to 120 mph then stalled out. It stalls out at lights and stop signs and tries to stall when I am driving,.