Bad service Woolworths The Village Centre

I asked my son to quickly pop in to woolworths The Village this afternoon at 17:30 to buy milk and bread, as I had 2 difficult and tired todlers in the car. I gave him my woolworths card to pay. After 20 minutes he came to the car, i was parked right outside the store entrance, and told me they refused that he use my woolworths card. This was a shock to me, as its my card and he has paid with it previously?? I then gave him my bank card to quickly pay. After waiting another 20 minutes i went into the store. They had him get back into the back of the line again. In the peak time. I asked the cashier to please speak to the manager. A tall man looked over at me, from the front of the store, and did not even plan to come and speak to me after the cashier asked him. I called him myself. He then slowly started to approach. I asked him why my son could not pay with my card, as he had previously. His very rude answer was that it was for *****. Its my card and my grogeries. Where in my contract does it state my son can not pay with my card?? I then also asked why my son was sent to the back of the que, after he reploed, very rude once again, that that is rules. I have always supported and loved Woolworths, especially because of their great client servce. Im dissappointed and extremely upset about this abuse, and rude employee. This could have been handled a lot better. I expect a formal apology from this manager. I have sent a complaint to Woolworths directly on 5 September. Bit somehow, the customer service has not bothered to reply.