untrained staff

I went to game store at Clearwater mall on 11June 2015, i went to buy a bycircle for my child, i used my game card to make a payment for the items, the lady who was assisting me showed a very bad attitude when my card couldn't swipe, she told me to replace the card without any explanation as to why the card couldn't swipe. When i tried to find out why the card could not swipe, she could explain and told me i should call the customer care centre. She showed no interest in trying to assist me find out why is the card not working. I then went to game store at west gate mall and there the card was working. I was not pleases by the attitude the lady at Clearwater mall showed when she served me, she showed no interest in serving completely. She didn't have her name tag and when I asked her name she couldn't tell me. I would really appreciate if game store at clear water mall could train all their staff on how to serve customers.