HORRIBLE SERVICE FROM WOOLWORTHS

On Wednesday 5th August, I went to Woolworths Sandton to make a payment on my Woolworths credit card account. I have not used this card in two years and all I'm just doing is paying off the debt. Woolworths sent me a message saying I should go and collect a new card but I didn't go because I no longer need it. I have always paid using my credit card and each time they do it manually. Today when I tried paying the account I was told to punch in a pin number for the old credit card which I obviously cannot remember as the card has not been used for purchases for two years, I have only used it for payments. no one offered any explanation, they just rudely demanded that I key in the pin number. Last month and the months before that, I have paid using the very same card and they would do it manually, no pin number was ever requested. I was sent from pillar to post until I got so frustrated that I left. This is a very busy period for Woolworths, what with the 50% off sale, the queues are ridiculously long. As I walked out I immediately got a very rude sms from Woolworths threatening to send my name to all credit bureaus for none payment. I'm one very frustrated customer and need answer