Premium increased by more than 60% without notifying me.

I've had a funeral policy with Hollard since around 2008. My premiums never increased drastically until recently. My premium was R88.75 this year. Suddenly in June they debited R193 from my account. I called to query this and I was told I was sent an sms notifying me of the increase since my premium increases annually. I never received any sms. They said my premium had increased to R143, they couldn't debit R143 in May hence they decided to debit R193 without notifying me. If I didn't had that money it would've been rejected and I'd owe the bank now.

The guy I spoke to said my premiums increased by 6%, I reminded him that this wasn't 6%, it was actually around 60% to 70%. I was paying R88 in May and June it was R143, that can't be 6%. I want to know how possible it is that premiums can increase so drastically. With more than 60%, how's that even possible? This is *******. The guy promised to check and get back to me. 3 weeks later there's no response. Instead they went again and debited me R143 for July. Can you please check this and refund me my money. Otherwise if this is how you treat your clients for paying, I'll rather go somewhere. Please pay back my money and fix the premiums.