pathetic service from miway and ross champion umh

Hi. My name is Preshalin Naicker. I drive a golf 5 2.0l fsi. I had a minor accident on the 05 July 2015. My car was taken to Ross champion umhlanga.(panel beaters) the car was assessed and the repair was authorised. This repair meant to be complete within a month. 4th week in july i was called to the panel shop to start my vehicle, i had drove my vehicle into the workshop when i had taken it to ross champion. The vehicle could not b started when i had attempted to start it. I am a technician for vw umhlanga, so upon the next day i had taken a diagnostic machine from work to find the fault on my vehicle. I had found the engine control unit blown due to the vehicle being jump started incorrectly. This i had found out myself. I had brought it to the managers attention. I was told it would b sorted out . I was promised my vehicle over 6 times. I had called my insurance company a number of times to have the issue resolved. I've been told numerous times the engine control unit is being repaired, yet it was suppose to be replaced with a brand new control unit. Till today I'm still waiting for my vehicle. I'm being messed around . I'm very unhappy with the pathetic service. I need my car.