Woolworths food takes twice the payment

I ordered woolworths food online and although I was satisfied with the on time delivery and condition of all the items I ordered my disappointment came afterwards.

When I paid for the food online on day of scheduling of delivery I didn't expect that I was going to be surprised the following morning after delivery (today) when the same amount was deducted from my bank account again. It is absolutely unfathomable how such a reputable store can have such a ridiculous system. I am still trying to come to grips with the idea that they, with their quality products, could be capable of such a blunder of double billing.