Master Tech Automotives Left my BMW outside in the Sun with Window down to fill up with Dust and dirt for over a month Alice Springs Australia

My BMW was not starting so was taken to a Motor Mechanic namely Master Tech Automotive of Alice Springs NT Australia.The Busines assured me that my BMW would be kept indoors in there Garage at all times.I explanded that I did not want my BMW left out side in the Sun at any time because of the extreme heat in Alice Springs which is located in the Desert.Temerature in the summer of up to 40+ Degrees.The result was my BMW was at the Busines for aprox. 2 months.The problem should have been diagnosed in at least a week with the write equipment that they obviously did not have.When I received my BMW back as I was over seas at the time.I found that the interior of my Car was coverd in Dirt and Dust.A result of leaving the window down.And had been also put outside in the Sun for long periods.And nothing had been done with my BMW.They had no idea how to repair the problem with my Car.This is unexceptable and I am very angry that this was done to my Car.Being this model BMW 540i purchase prise was $150,900 from new.My BMW systaned Sun and interior damage.This Car is my pride and joy and I want anyone with Motor Vehicle to know the people of this busines will not respect or take care of your Vehicle in any way.And are very dumb.