Discovery Bank’s incompetence astounds me

It was suggested to me that I close my reviving credit facility with Discovery by one of their consultants as it was blocking my credit card application. This I did….. they went on to show me that my disposable income is R23 799 which is wholly inaccurate, and even if it were that amount according to their policies I would still qualify anyway…….. Maybe I can get them a calculator for Christmas, or their consultants need better training, whichever comes first would really make a difference….. It’s hard to believe that a bank this highly rated can be this ***********…. I have close to R100 000 in my account with them, and that’s not even the account my salary gets paid into…. Again, am I missing something here?