dissatisfied customer

I was doing my shopping this evening at the Game in canal walk and was turned away as my card didn't want to swipe, I was advised before that it was the quality of the card that caused it to work on some occasions but not on all occasions. I was never bothered with it as I was always helped at the N1 city, sanlam, golden acre and Tygervalley branch. They have always put it through manually provided I had my ID with me. However in this instance the manager told me that this was not the store policy and in my defence one branches policy can not and should not be different to another so I was highly ****ed off due to the time and dat I could not go to another branch and I did not have my bank card on me to pay. The manager had no other solution for me other than going to a RCS which made no sense as i needed the groceries. I can appreciate people wanting to do their jobs but you can not turn me away due to a fault with the card that you have supp**** me with nor can u blatantly lie to me and say that it can,not be put through manually if it has been done,for me by other managers in the other branches and not at my request! I left the store highly upset and doubt that I will go back.