Bad service

I write this a very dissapointment and an unhappy customer. Last year October MiWay took my vihicle to AutoMagic in Lyttelton Centurion for repairs. I discovered recently through 3rd party report that they did an appaling job in fact the car is as good as not fixed. Had to take the car back under thier **** warranty but they refuse to take responsibility. Matter reported to Miway and they are noy coming forth either. I am actually stuck between a rock and a hard place.