Ridiculous premium increase without claiming

I got the shock of my life when I went through my account and discovered that my premuim had gone up by more than R800. For what? I went from paying R1734,98 in October to R2544,56 in Nov. I reversed the debit order because there is no way I'd entertain such ludacris. I drive a 2017 paid up car, whose value depreciates monthly. So, other than it being daylight *******, how does Momentum justify this ridiculous increase? I'll take my money elsewhere because there's no way I'm sitting back and allowing this.