Vision Kia of Canandaigua

My 2022 KIA EV6 GT was in their shop for 33 days. I had heard a loud "pop" and the car was nearly disabled. I described the problem, but instead they called it as a low 12V issue and ordered a new 12V battery. After some days and they couldn't get a battery I found forums talking about a technical service bulletin (TSB271) which perfectly described the problem and said look for an engine code (.....9096). I repeatedly told the service people about this but got a blank stare in response and finally - "no, we didn't see a 9096 code". Finally after 20 days and lots of unreturned calls they opened a "tech line" to KIA Korea saying they did see a 9096 code and KIA Korea told them to order an ICCU assembly and fuse and replace it. Those parts took a few days to show up and then they plugged the car in to charge it. It was left outside overnight to charge - unlocked with the key in the cupholder. And after all this time with them saying the 12V battery was bad - the original battery was left in the car!! The review would have been lower, but for now the car works. So, the problem was fixed but only after a lot of my involvement. Lots of misinformation from the service manager. Very frustrating. I'm a retired engineering manager for a large corporation making complex electromechanical products. I know how a service organization should be run and this isn't it.