Woolworths and ABSA cheating customers

I have bought Azzaro Aqua that Woolworths have on special now. I was short a couple of rand on my account to make the payment. So I paid with my Woolworths account with my ABSA card to make up the difference. When I tried to pay the system would not accept it. I called the Financial department and was told it takes 12 hours to reflect. How on earth ? Is Woolworths then not part of ABSA ? Anyway, I was prepared to wait the 12 hours. Now, when I checked, the perfume was removed from my cart as they no longer have any in stock. My problem is just this: when I pay with my card it should reflect immediately , why did it not? Why a waiting period ? And again I loose out. i am very very upset with Woolworths online