Can't solve my password problem, I'll close my account

I am bitterly disappointed and frustrated with Discovery Bank. My email address has changed and my cell phone number. When I try and log in to the app. The OTP is sent to my old number. I have phoned Discovery about 6 times to try and rectify this and I always have to be verified with stupid questions and an agent will phone me back. Still not sorted and this has been dragging on since last year. I'm just going to cancel my account as this will be easier than trying to get access to my account and they have lost a client. We'll done Adrian Gore and team