Standard Bank vehicle finance

Standard Bank vehicle finance are ****mers they gave me interest rate for 16.42% which was used when they financed me for my first car, when I go to buy my second car which I was financed by them again they didn't do any amendment they just used the same rate, when I asked for refinancing they said no it can only be reviewed by the end of the term, they don't wanna assist as they are benefit while they are able to refinance other clients by lower rates from other banks but they are not kin to assist with as their client. I Bank with them n I have a high profile for different products with them but they are not kin to refinance me with my vehicle again.