Very High intrest rates

I am really disgusted in the high intrest rates that wesbank is currently offering, i wanted finance with wesbank, as i am a fnb customer, it makes it much easier if everything is at one bank. Never in my life i had skipped any monthly payments, i overpay everything instead. Now why should i be penalised like this if all my things are very nicely paid every month. I have a linked intrest rate not even fixed and its very well over 14% as i have had finance with absa on my previous car and the balance was not even close to 70000 on that car the rate was however far lower than that. Now i had finance of over 100k, why should i be penelised like this. If you dont help me regarding this, ill have to get another bank to refinance this vehicle as at the end of the day with the fees its still going to be alot less over the peroid, i gave a deposit and took a maintanance plan, so i dont see any risk. Thanks