Unfair premium adjustment

I joined Discovery Insure on the 1st of June 2022. I hold a classic plan comprehensive car cover with them and that is when my cover started and I was told that reviews are only done on a yearly basis. To my surprise, I received an email saying how "incorrect" information was used when I initially started my cover with them and as a result, my premium will be increasing from R1 089.57 to R1 406.41. I called to enquire about the supposed 'incorrect' information and what the correct information actually is but the person on the line would not give me a straight answer! He kept telling me how I am not the only one affected but I did not call to ask about other people's premiums but my own!

I do not understand how the review took place 6 months into my cover instead of a year. The difference between the premiums is R316.84! An amount of money that was NOT planned!!! How do they do this without the decency to let me know what the actual reason behind the increase! I feel like I was unfairly treated and I was misled by the person I spoke to when I opened my cover in the first place because she should have mentioned that covers are reviewed in 6 months, not 12!

They should take my premium back to what it was unless they give me a VALID reason as to why it increased! I haven't even claimed to at least justify the increase! Discovery insure is really playing a dirty game and that is unfair to me as a client!!