Discriminatory insurance from Discovery Insure

I've been with Discovery Insure since 2019. I recently sold my 2012 VW Golf GTI 2.0 DSG on the 29th Feb 2024. Car was taken off insurance and I added a 2017 Polo Vivo 1.4 concept line. My premium on my GTI was just under R860.00pm. The premium on the 1.4 polo is now R731.02pm. Retail on the GTI was just over R210 000, retail on the Polo R131 000. My girlfriend drives the exact same model and year Polo and her premium is less than R500.00pm. Cannot get a satisfactory answer as to the difference in premiums other than blatant ************** between male and female drivers.