They refuse to fix my car

My second bad insurance, my car was ****** and recovered last year 14 September 2020, they took my car to Centurion Panelbeaters, there's a very rude lady by the name of Bernice Vermaak from Iwyze, I phoned her several times complaining about why are they taking long to fix my car it's March now almost 6 months since my car went for repairs, she asked me to buy a battery for my car for the panelbeaters to check the mechanical faults because insurance won't buy a new battery for me, I bought a new battery and drop it to the panelbeaters, they took my car to VW to check the faults, they discovered that the car has mechanical faults, Bernice told me they can't fix my car because it's an old model but when they stole my car it was in a good condition, they take out the tracker, number plates, license disc, it was discovered in Mamelodi it's a white Golf7 Gti 2014 model, they painted the scratches only and refuse to fix the mechanical problem, I went to collect my car with a dashboard full of orange lights, it was overheating, I had to call a breakdown to take my car home while I pay a large amount of insurance money, I don't recommend or advise anyone to use Iwyze