Dishonest staff, adjusting policies to meet his target! My premium up 25%?? I gave NO permission for any adjustments.

I received a call to give me a quote for my car with the building insurance I have. After the quotation I persisted to say NO, I am not interested. My premium for building insurance was R598.55 and this month it went up 25% to R747.21. I do not know what he did to get "HIS TARGET" but I DID NOT give permission to adjust anything on the policy!! I have been trying to call all morning and waited for over 30mins a few times. I requested a call back but still no answer. I would like an answer to what happened here and want to know if there is going to be any accountability.