Gross Incompetence and Poor Customer Service

I went to collect my store card on sunday the 12th, I arrived a few minutes after 13:00 . The lady at card collections going by the name of Khensani called me to the counter and asked what i came for, I told her that I app**** for a card on line and it's now approved. She told me to go join the line as she was busy with another customer. I waited there until the store closed at 14:00, only at 14:30 Khensani called me to tell me that she wont be able to help me because she have to call the offices and they close at 14:00. My argument was that she let me stand on the line for almost 2 hours and tell me on the last minute to tell me that she can't help me but she knew very well that at 14:00 the offices are closing but she didn't tell me not to wait even thou she knew what I came for. When I confronted her she gave me a stinking attitude and rose her voice at me shouting that she couldn't tell me because she was busy with another customer which is just a lame excuse because there was only one customer in front of me and when shes finished with customer she would toke up to 5 minutes sorting files so she could tell me while sorting out the file. Out of decency I just expected her to be honest with me and just tell me on time that shes not gonna make it so that I don't wait in vain but she was remorseless and rather rude.