Over charging

I have a policy with auto ang general i was paying R2871.07 now my account is debited with R3501,94 i called them to find out about the increase of R630.87 they tell me about the risks invoived’when i check my policy in july for my ford i was paying R938 now its increased ti RR976.85 my other car from R571,50 to R927.62 then the last car increased from R724.34 to R973.43 my house contents from R118.75 to R165.30 my cell phones from R280.68 to R425 .74. All these increases are way too much for an ordinary person ti just increase them without even consulting the customer. I need an explanation otherwise il go to your competitors! This is honestly insane