Account blocked without notifying

I'm a client at Nedbank Potchefstroom North West and I have encountered a problem with my card. I am made aware at a till point that my card is blocked yet no communication was made from your side to alert me that my card is being blocked for whatever reason. I went to the Mooirivier branch in Potch to get clarity on to what is the problem with my account, I was not assisted due to I didn't have an original copy of my ID card and I asked to be assisted with a PDF file instead but that was a fail. I just want to find out why do we do the biometrics if we can't get assisted using them? Really the service that I got was absurd and very unprofessional. First of I was mot even made aware that my card getting blocked and I have less than 3 months using your services but my card gets blocked and I am not even notified when that happens. I am really not happy with the services rendered by Nedbank. I can't access my money now because of a blockage I have no idea what it is for. Please assist me with unblocking my account because I have no idea why it was blocked in the first place.