2020 Kia Stinger ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE

I was sitting at a red light with my foot on the brake. When I took my foot off the brake when the light turned green, my car would not drive forward!! I checked to make sure my car was not in Park. All of the lights on the dash were on and the engine was no longer running. Not to mention something similar happened November 18, 2023 where I was driving and the engine suddenly lost power And cut off, and it would not crank back up for longer than 3 secs w/o losing power. my car could no longer run. I ended up having to get it towed to a local Kia dealership On Covington Pike in Memphis, TN (the location on Mt Moriah informed me that if I took it to to their location, I would be charged $175 plus tax for them to run diagnostic on it, and it would be best to take it to the location that I purchased the car from—THAT IS ABSOLUTELY INSANE & ridiculous!!!) and all they did was replace the high pressure fuel pump. They did not hook my car up to do a diagnostic, they just went off of the code reader my friend had. The code showed P0088- fuel rail/system pressure- too high. Nothing else was checked to see if it was defective. That particular kia rep told me that there wasn’t anything they could do unless there was a check engine light lit up on the dash. Now fast forward to today, a similar situation happened, but luckily my car was able to start back up. I’ve been waiting on them to perform 1 of the recalls for over 3years now and it’s always the same story, they don’t have the part, they would have to get that ordered & contact me when it comes in & when it comes in, they don’t contact me!! I really want to know what’s going on with my car for it to still be fairly new and to have these issues when I keep the maintenance up. I can’t afford to be stranded or put myself or the lives of other motorists on the road in danger because my vehicle will randomly lose power out of nowhere. That’s unacceptable and dangerous!