Don’t sign up with this bank

I tried joining Discovery bank but what a nightmare. When I tried to join the bank it said my ID number was already registered. I had discovery insurance many years ago and thought perhaps I had created a profile then. Went to website to reset password and no sms, no email. Called discovery bank. ID is linked to a completely different number and email that isn’t mine. Went to three departments, no none can assist me in fixing this and I can’t do it from side cause I’m not getting the links. It makes no sense whatsoever ever that it can be amended correctly in the banking side, which means my ID number was used **********ly to open a profile.