I’m disappointed in non responsiveness of Nedbank

I’m disappointed in non responsiveness of Nedbank. I called in 2 days ago to close my credit card and they promised that someone will call me to finalise the process. I still haven’t got a call and I followed up today and I couldn’t do through the credit closing department. I’m worried that their delay to close the account is costing me unnecessary bank charges. It’s easy for these banks to give us credit and it’s a mission to close the account