Uncompetitive financing deals

For context, I had been banking with Standard Bank for 8 years before this happened: I was promised favorable rates on vehicle financing if I upgraded my account to a Prestige account (higher monthly fees). But I got an interest rate quote probably higher than someone would get without the Prestige account (no bad credit or blacklists on my side). I asked for a review and they came back with even a higher interest rate (talk about madness). Giving them two stars because I have experienced acceptable general service with them, except for debit/credit card ****s which are a bit frequent.