Took my car in for rego and they proceeded to do further work changing lights etc, because my car failed rego. They took over an hour to 'fix' the problem but charged me $150 for the work AND wanted an additional $350 to fix it...
Luckily my auto electrician fixed it in minutes for a cost of... $15.
Poor customer service there - they had my phone number but did not call to ask for authorisation to do repair work on the vehicle.