NHTSA Complaint #11445835 — 2012 HYUNDAI VELOSTER

I had a recall done on my car, and driving 10 mins from the shop it lost power. I called the shop they had me pull over and try shutting off the car and starting it back up which didn't work so i was told to drive back if i can make it , it took 25 mins with the throttle going up and down. They had it for about a hour or two and said it was the oil being low 2 qts. But, they put 3qts in, they got it working and 2 weeks later it did the same thing, I called and took it back they said it was the spark plugs and I had to pay for that. I explain to them I had no problems until the recall was done and they say the recall was good. So now we 2 months out and the thing which the recall was for is completely broken (Throttle /ECM). I was on Christmas vacation when it went into protection mode and I couldn't drive it. It showed no codes until I had mechanic come change out the throttle Body but it still doesn't work because these codes P0222 and P0123, which is the throttle position pedal. I had to tow the car back because that's not a regular carried part for auto parts stores. What's the next steps on getting this fixed because Hyundai refuse to fix it.