Bad Service plus compromised personla information

I app**** for an overdraft three weeks ago, got a pre loan agrrement, completed the forms and signed, still waiting for feedback after been promised that it will be activated within 7 working days. Whilst waiting for nedbak to activate the overdraft, I received a whatapp message from a stranger, to cut the long story short, the person had received my pre loan agreement form which had my personal information and very confidential information. One need a password to open the document which is your ID Number. The person then had to share with me his ID number so that i could open the my documents that he received from Nedbank, it turned out that he was not a ***** instead my confidential information was compromised by the bank. Sent coupler emails to get clariy as to how did this happen and also to find out what is the ststus of my application, to this date no one has bothered contacting me. Tried calling Llewelin and when i was holding to speak to him, It got cut. That is very very dissappointing service. I am an unimpressed Client afer so many years with Nedbank.