Unilateral implementation of yearly short term insurance increase in premuims

I have been a client of Momentum over 4 years and previous Alexandra Forbes(who merged with Momentum).Every year on the anniversary of your policy Momentum issues out a proposed increase letter.This year the letter was sent out in June 2024 and the increase was unilaterally implemented on July without my consent (and deducted from my bank account). When I enquired from the official at Momentum, I was shown a screen shot of an email sent to me. How does Momentum implement increases without getting endor*****t from the client (if they can get hold of you [email or voice calls), at least send an email (multiple times emphazing the constraints).My policy was R1268,02 and is now R2218,50. Momentum does take into account one's financial situation, only looking at what benefits the organization. I one dissatisfied customer and will be leaving Momentum, cancelling all my policies (house interior, exterior, vehicles x 2).