NHTSA Complaint #11446079 — 2022 KIA K5

I bought a 2022 Kia K5 on 06/18/2021. On 12/31/2021, the check engine light came on, it shows code P088000 in the Kia Access app. Transmission control system issue. It started to jerk slightly when shifting into reverse. The engine is working twice as hard as it should when trying to pick up speed, using gas at double the normal rate. It will not downshift unless I actually release the gas pedal so it runs at high rpm's at all times. Driving at 55-60mph, the rpm's are at 3-3.5K and it will not downshift at all. (Unless the gas pedal is released). I have called for a service appointment, and my dealership (Joe Myers Kia/Imports) in Houston,TX. And there is a 2 week service wait. I was told there was nothing they could do, they do not have loaner cars any longer. I have to wait to get the code diagnosed.