Standard Bank after 45 years I will close my account

On twenty second March twenty twenty three I app**** for a credit card at Standard Bank Somerset West Mall. My application was approved but at the highest possible interest rate. Having been with this bank for more than forty five years my salary deposited for the same period with a transactional savings account this is what I got for my loyalty to this bank. I asked the consultant for a better interest rate which she said had to be escalated and would take fort eight hours. Today and notwithstanding my various inquiry emails eleven business days later my application nor lower interest rate has not been finalised. Today I sent two emails to the consultant at Standard Bank Somerset West and needless to say NO RESPONSE. Either approve a much lower interest rate or cancel my application. Is this so difficult for a bank of your size and reputation?