humiliated due to unknowledgeable staff

My Family and I went to the Parow centre on 27 June 2015. On our arrival at Parow centre my wife decided to go to Woolworths to get a new card cause her card is missing. My wife didn't use her card for a while and it was paid up, but there was an insurance on the account that **** the account go into an arrears, which we weren't aware off. My wife paid the money and decided to buy a few things on her account so she asked for a temporary buying card. The lady that helped us proposed that we get what we need cause she's waiting for the key. We then went downstairs to buy some groceries and I told my wife to go get the temporary buying card cause we can't go upstairs with the unpaid groceries. When we got to the till the transaction didn't want to go through and after investigation it was found that the payment will only reflect in 24 hours. WHAT AN EMBARRASSMENT!!! I mean we were all packed up and ready to leave, and then had to take everything out again. If we were told in the first place we would've known that we couldn't purchase. The lady that helped us at customer service knew that we want to buy cause she told us to get what we need. This is really bad and what a humiliation!