Disgusting Service and Numerous Issues!

I've never dealt with such incompetence in my life! I've been trying to open a current account with Nedbank online but I keep getting an error saying I already have a Nedbank ID and I should input it. I do not know my Nedbank ID so I tried requesting it using my ID number but because the cellphone number that Nedbank has on their system is outdated by nearly 4 years, I cannot receive an OTP to retrieve my Nedbank ID. I then called the contact center and after explaining my situation to the consultant he transferred me to a lady in sales who then told me she cannot assist me with a current account because I already have an account on the system. This account was meant to be closed years ago but Nedbank did not close it. She then kept insisting that she can help me with a credit card even though I told her I need help with a current account, credit card, vehicle finance, and an overdraft. I then asked to speak to her superior and she then muted the call and did not return to a point where I had to drop the call because I was on hold for nearly 20 minutes. I then called back and was transferred back to sales and spoke to a lady called Rene who then said she needs to put me through to the service team to assist me to close this account. She also put me on hold and seemed as though she did not know how to use the system! Finally, when she is about to transfer me, she cut the call and did not call me back! Is this how Nedbank greets its potential new customers??! It's appalling! All I am trying to do is move my current portfolio full of banking products from my current bank over to Nedbank and they are not taking me seriously at all!