Fed-up

In the 40+ years I have been with Nedbank I have never called the card division without getting problems instead of solving problems! I got an additional card on my credit card account for my daughter years ago. She does not use it anymore because she has her own account and cards now. So I called the card division yesterday to tell them I would like to cancel that card and both people I talked to told me they would block it, not cancel it, for in case. WHY?? I see on my statement I am indeed paying a fee for the additional card. I am a pensioner and don't want unnecessary fees and costs. I explicitly told both people we would NOT be using that card anymore. You can listen to the recordings - I got quite upset and rude because they did not want to listen. PLEASE, PLEASE, PLEASE CANCEL that card - we don't need it anymore, we don't want it anymore and I don't want to pay any fees for it anymore or be notified that a new card is waiting at the bank ever again. PLEASE!!