Outsurance yearly increase in premiums way above inflation

Year after year I have to battle with Outsurance trying to increase my premium each year by more than 3 times the inflation rate. The bottom line is that 75% of my premium goes towards my 4 cars - if I am not mistaken the value of cars go down yearly - the only thing that might cost more is repairs - I haven't had an accident in 30 years. They mention 4 things they consider when increasing their rates but fail to mention the fact that they do visit their clients credit profiles and that seems to be their main barometer when adjusting premiums!!! I have now had it with Outsurance - warned them last year not to visit my credit profile again without my consent as it affects ones credit score. They originally bettered my insurer's premiums at the time and now they are trying year after year to make up for it.