Discovery Bank have you got such financial problems again?

Discovery Bank, how stupid do you think your clients are that you have to make up asinine excuses why although, you have debited their accounts, for the amount owing on their cards, that you do not credit their card account immediately, or at the latest the next day, the debit order is confirmed, as companies do, but make up ludicrous reasons why their cards can only be credited " four to five days later". And no, the fact that the debit is from another bank holds no water whatsoever, as anyone with an IQ above double figures is well aware of. The fact that the monies are reflected in their Discovery bank account means not a jot to you. When I last stated this fact about four months ago, someone must have decided that I am not an idiot, and the card was credited at the latest the next day. I wonder what happens to the interest that I should have earned whilst the money was in my account. Oh, wait I don't see any. However here we go again.....