Do not open an account with Nedbank because you can never close it

I closed my Nedbank account on 21 January, because of terrible service I received over the past 2 years from Nedbank having a so called personal banker. Since 15 February I have been receiving SMSes from Nedbank stating that my account is overdrawn I and I need to pay. I also received an email on a Sunday demanding I pay my account. Despite contacting my previous banker twice and the collections department who all state that this problem is now solved I today again received this message demanding payment. Firstly How can I pay an account that is closed? I cannot even access my profile. Secondly none of these messages even state how much I supposedly owe.

Is everyone at Nedbank equally *********** or is there someone who can actually fix this?

I am an excellent payer who does not leave overdue accounts, this is very concerning for me that Nedbank thinks I owe them money and they cannot sort this issue out, and at the end of the day I am the only one who is going to be penalised for their problems.