wasteful resource at Absa/ failure to close my credit card

Since March 12 I have been calling Absa to tell them that I want to close my credit card. the lady by the name of Lizette assisted me. and indicated that I will be called back. to date no one from Absa has called me to inform me that the card has been closed. I am wasting my airtime everyday day trying to sort out something that should have been done on day 1. Told them I no longer need the credit card.