Mazda woodmead parts department should just close their phone lines

If Mazda wants to shutdown they should inform us the clients because I'm running a business and when you call for spares no one answers and when I got answered by the receptionist on the 6th attempt and I explained to her that no one is answering in the parts department, instead of escalating the matter she transferred me to a dead line before I had finished explaining. This is not the 1st time this happened and there seems to be no sense of urgency in addressing this inconvenience