Account closed without any notice

I would like to express my unhappiness, my account was closed without my knowledge, I've called the call center got *** on the 26 November 2020 spoke to Vuyiseka and Hlumisa trying to get clarity on why this account closed and who gave the instructions to close it because I didn't receive any call from Standard Bank to say the account will be closed due to the following reasons.

On the 30 November 2020, I called the call center again to do a follow up and spoke to Portia, as she tried to help but couldn't because even now this account I'm unable to see on my banking profile. This has inconvenienced me because I was unable to use this facility on the things that I've planned.

Lastly I'm not sure if is this how things done if not, I would really appreciate a detailed explanation, if yes, why the accounts were not closed, if Standard Bank wants to end the relationship with me, I would appreciate a notice period so that I can make other arrangements with someone that can acknowledge me and appreciate to do business with.