2016 Kia Optima engine problems

5/9/23 appointment for 4 recalls -completed 2 and ask if we could bring back next day to finish and we said no because granddaughter in school so service manager said important to get it back in and finish and sent granddaughter home with car 5 days later while driving car caught on fire and lost brakes and transmission and swerved into vacant parking lot smoke and flames coming into car and girls had to jump while car was still moving both girls checked on sight for smoke inhalation.

My vehicle started stalling when accelerating two days ago. My rpm's jump when shifting gears and it stalls and jerks when taking off from a complete stop. I took it to advanced auto parts and the code "p1326" showed on their code reader. Knock scensor is under the code and I've read where multiple people with this make and model of car have had the same issue and had their whole motor replaced.