Banking app not working and can't get issue resolved

I saw that there was a review from someone else this morning with the exact same issue.

I had an account and closed it a long time ago. Tried to get a new account now, but I can't join on the app. It keeps going in a loop, when you try to join the bank it says that it's unable to log in because you are not a client and to select join the bank. I I have spoken to so many people now, and I explained the whole thing over and over. I really don't have the time to call discovery bank everyday and explain the same issue to someone else everytime

How do I get this resolved?