Standard Bank cancellation of Credit Card

I took a Standard Bank credit card, used it and paid it back. I want to cancel the card and they are taking me from pillar to post. I visited the office they said I must call, when I call they said I should send an email to insurance if credit card. I send an email they gave me a case number ***2, said they will reply in 2 business days. Two days past they never rep****. Is like they don’t want me to cancel the credit card, they just want me to pay it even not using it. My last option is to report Standard Bank to NCR. When I took a credit card I did it in less than an hour, but when I request to cancel it, they tell me of many procedures with many days. This experience is bad.