Hyundai i30 2013: Cracked sunroof

My 2013 Hyundai i30 went in seven weeks ago for a major repair under warranty for a crack in the sunroof. The repair is still not complete.

I have been told on two separate occasions that the car has been put back together and that the sunroof or the interior blind are not working.

The dealership has been told by Hyundai that the Hyundai wiring diagrams to fix the problem with the car do not exist and they are not providing a solution for the dealership that has repeatedly contacted them.

I have contacted Hyundai Customer Care myself with no reply.

I'm not sure what my next step should be and neither does the dealership.

My main concern is that my car is not being repaired back to a factory standard as Hyundai is providing no support or answers for the dealership to fix the problem. I have been told it is an intermittent electrical fault, which I fear, impacts on my safety when driving the car.

The main reason that I bought a brand new Hyundai was for its safety features and the assumption that I wouldn't encounter a situation like this. I'm at a loss as to how fix this problem and get my car back repaired to a safe and factory standard.