Annual premium increase of 25,56% without notification & when it's ******* for me to earn an income!

I've had car & household contents insurance with DialDirect since 6 April 2018. Last year, I got notified of the intended annual premium increase. This year, they chose NOT to send any notification (reading other reviews, I see I'm not the only client who has this problem). They simply decided to increase my premium by 25,56%, and deduct it from my account at 02:14 on 30 April 2020. I emailed them at 09:40 on 30 April, and again on 4 May at 15:30. I'm still waiting to hear from them, which is why I've turned to this platform. I'm ticked off that they would increase the premium by such an exhorbitant amount without notification. It's attrocious that they would do it at a time when my husband & I, like so many South Africans, are legally not permitted to work and have had NO income since March. And when the risk of me claiming is lower than ever - there are police all over the place monitoring people's movement, we & our neighbours are home 24/7 (more eyes keeping a lookout for trespassers so we don't only have to rely on our security cameras), we have law enforcement & our security company's armed response patrolling our neighbourhood 24/7, and my car has been out of the garage - in our access-controlled complex - ONCE since the start of lockdown (and that was just into the driveway, to let the car idle so the battery wouldn't go flat!). How is a 25,56% increase justified?!!!