Useless bank Nedbank

I regret joining nedbank as soon as all payments of the credit card I closing the account. "I bought a car through mfc and was told to move my account to nedbank so that I can benefit from rebate my installment will be reduced by certain percentage. When I call!! . I was just asked do you have something on paper that say we will give you rebate. I am closing the account and moving my salary back to my previous bank. Nedbank its nightmare I regret. When I think about calling them I fill like am ********. ??? I should have listened to my friend.