Supercharged for unnecessary work

I took my car to Car Service city Randburg for a service. They called me telling me that there is R 12 000 work that needs to be done on my car. Luckily I decided to only do my service and get a second opinion. (And I dont have R 12 000 to paid. ) I took my car to a different service centre and most of the so needed work on my car never showed up on the diagnostics and that "so needed" work was not necessary at all.

The only reason for all this needed work would be that I am a women and the Car Service city wanted to make money out of me.