Battery Cable Problems of Chevrolet Spark

Purchased vehicle in 2014 brand new. The radio screen said check antenna when on xm (we had a free trial but it wouldn't work) so we took it to dealership for diagnosis, where they said there was a chafed wire behind radio. They repaired but radio still didn't work correctly, and so they replaced the entire radio, this was in 2015. Now it's 2019, and sometimes the car won't start, the signal chimes won't make sounds and the radio will not turn on, random lights come on in the dash - including a failure light about the airbags, and a brake light went out at the same time. We had the key chime recall completed, but this issue occurred anyway. We replaced the key fob batteries, the car would still not start randomly. We took it in to the dealer again and they said the issue was most likely due to a loose battery cable - it was repaired. Now a month later, the radio again doesn't work again and the sounds in the car (signals,etc) don't work again, and we expected the car not to start again since those were the signs that occurred before it wouldn't start. We took it back to the dealer, they say the radio doesn't work and needs to be replaced. This is the 2nd time the radio has been replaced in 4 years. Electrical issues have been a problem since the day we bought it. . I strongly believe there is something majorly wrong with the electrical makeup of this vehicle and that the radio not working/ causing other problems, is just an underlying issue being caused by something greater. Please help.

See all problems of the 2014 Chevrolet Spark 🔎.

Went to store a couple miles from home, came out of store and car would not start. Thinking maybe the battery was at fault I tried jumping the battery and still nothing so turned the ignition off and took keys and got ride home. Then upon returning to store to pick up items purchased the car was running without the keys and the ignition was in the off position. I had the woman come out of the store to see this. And it also freaked me out on how this could happen. Then I called vic koenig in carbondale, illinois where I purchased the car, and at first they said it wasn`t covered under warranty because it had 39,000 and warranty ran out at 36,000 and that they never heard of that where a car just starts up without the ignition turned on. They wanted me to bring it in, I was afraid to even drive it so I called napa down the road and a couple of there mechanics come over to see that it had started with the ignition turned off. So then they gave me a ride home and the other one took the car back to napa garage to disconnect the battery cable and see if that would shut it off, for I did not even want to step foot in the car.