A very unprofessional bank!

I have also been receiving unsolicited mail even emails from Nedbank offering me debt consolidation, claiming that my overdraft extension has been approved, etc. What overdraft? I DO NOT HAVE ANY ACCOUNT WITH NEDBANK. I am not a client of Nedbank. I have never even app**** for anything from this bank. I tried several times to complain and asked them to investigate but nothing came of it. I sent emails and asked them to investigate, to which I got no feedback. When I eventually called them on the phone, they asked for my ID and other personal details. If you have been sending me correspondence and I send it back to you in my complaint for you to see what I am talking about, how come you need my personal details? Don't you have them already? it does not make sense. Even now I am still awaiting feedback on my complaints. I even sent an email and called their to their ***** Department, but, nothing came of this. What a bank!