NHTSA Complaint #11630912 — 2014 BUICK ENCORE

My 2014 Buick encore at random times when I turn the key to start the vehicle it just clicks once then complete power out even though the battery is fully charged. To deal with the issue I need to open the hood, unplug the negative from the battery and reconnect it. Then try again. I do this at least once every week, sometimes multiple times throughout a single day. It also does it when a new battery is used. Ive also has a mechanic inspect the vehicle and was so frustrated that everything seems okay but just couldnt figure out why the vehicle don't start. 12 hours of searching for the source of the problem , After giving up on the vehicle I turn the key and it turned on. Other time the vehicle will turn off when already driving. I need this problem fixed. I honestly regret financing this vehicle in January 2024. I was dealing with this problem since May 2024. 73000miles when I bought the vehicle and now at 84000mile. Half of the year 2024 it's been repeat problems with this vehicle. This vehicle should have been a lemon.