Transmission Stuck In Gear problems of the 2012 Chevrolet Cruze

I was at a stop light when the light turned green I pushed the accelerator an the car was jerky. I the car finally moved and there was a loud bang from the rear and it felt like I had been hit in the rear. The car jerked, sputtered and then stopped moving. This was a few days after taking the car to the dealer and telling them the car was not shifting properly. They fixed my broken tranny but it still does not drive safely. It doesn't accelerate, the gears get stuck merging on the highway is a nightmare. Almost two years to the day my car is once again at the dealer for the exact problem. I was driving up a small incline, pushed the gas the car struggled to go. There was a loud harsh jerk the car finally moved. It sputtered and the check engine light came on.

I received my chevy Cruze LS in August of 2012 after having it for a week I started to notice issues with the transmission. I drove it up north and after being on the freeway going a constant speed of 75 mph, when forced to slow down due to traffic the car could not figure out what I was trying to do and just had a mind of its own. The rpms would shoot up very high and the car would struggle to accelerate (almost as if it were stuck in neutral) and eventually it would jerk forward very hard and then accelerate. This happens every time I get on the freeway now and have to slow down because of traffic or slow down to get off at the exit (and continues well after being off the freeway). I am lucky I haven't been rear ended and severely injured or killed. I've had the car for almost two years now and its only gotten worse, it now does the same thing when driving down the street at 30 mph, it will be going along just fine then all of a sudden the engine revs as if it were shifted into neutral and then catches itself and jerks really hard and is fine again. Also when slowing down it seems to downshift too quickly almost coming to a complete stop on its own, which is why I am afraid of being rear ended. I have taken the car in to 5 different dealerships and am told every time that either they don't see the problem and I don't know what I'm talking about or they can see there's a problem but there's nothing they can do about it. I'm very disappointed in the quality of this car, I've also had issues with the radio and my usb cord not connecting to my phone and even when it does connect the songs come through with lots of static. I have tried different cords, different phones and multiple ipods and it keeps happening. I feel totally helpless and am sick of feeling unsafe in my car. My family has always bought gm cars, this is my second chevy and my last!!.