Petrol Contamination

I used BP Simon Vermooten garage to fill up my tank on the 13th September 2019 Two weeks later my car 2019 VW Polo Vivo just stopped in the middle of the road . I then had to be towed to the nearest dealership and the diagnosis was that the petrol used contaminated the petrol pump and tank. I then shared the diagnosis with the insurance and BP garage SA. I am without a car Incestigations I feel are already predetermined No samples from my car has been taken I am seriously inconvenienced . BP please fix your mess