Bad service

I am glad I don't have my main account with Nedbank, they are totally useless. All I wanted was the correct installment and they said they cannot verify me as they have my old cell number but on the statement my current cell ending numbers are indicated, which means that they have the current no. I was advised to go to the bank to update my details, really? during covid crisis. I asked to speak to the manager and I was put on hold forever, a normal tactic.