Dangerous practices, *********** processing, and wasteful of client's money

I've been trying to close my credit card with them since early last month. I settled the account and contacted them, and was told I needed to wait 2 days for the settlement to show and then contact them again. I did, and after some questions, I was assured that my credit card will close in 5 days. On the 15 November, I received an sms confirming my account was closed, and I was relieved, and never thought about it again, but soon after I started getting a LOT of marketing calls from Nedbank because I apparently still have a credit card. I logged in to my banking, and it was still open, and charges had been going through it. I settled once again, and went into the St George's Mall Nedbank, but after an hour of waiting, they said they can't help and I have to call the helpline again. So I called again, no one could explain why it was still open, but they are escalating and it will be closed soon. I just logged in to my banking, and not only is it STILL open, there are new bank charges to settle yet again! This is awful incompetency, and you are wasting my money too. If I just believed the confirmation of closure SMS, I would be in growing trouble, it's so scary to deal with a bank that does not do what they say, and incur you costs and risks. This last bank charges should be settled by Nedbank, since my account is already supposed to be closed. This has gone on for over a month, please fix your mistakes and do your job